diff --git a/api/src/Entity/Day.php b/api/src/Entity/Day.php
index e1e065d774..7b490cf5ef 100644
--- a/api/src/Entity/Day.php
+++ b/api/src/Entity/Day.php
@@ -8,7 +8,6 @@
 use ApiPlatform\Metadata\ApiResource;
 use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\GetCollection;
-use ApiPlatform\Metadata\Link;
 use App\Repository\DayRepository;
 use App\Serializer\Normalizer\RelatedCollectionLink;
 use Doctrine\Common\Collections\ArrayCollection;
@@ -34,13 +33,6 @@
             normalizationContext: self::COLLECTION_NORMALIZATION_CONTEXT,
             security: 'is_authenticated()'
         ),
-        new GetCollection(
-            uriTemplate: self::PERIOD_SUBRESOURCE_URI_TEMPLATE,
-            uriVariables: [
-                'periodId' => new Link(toProperty: 'period', fromClass: Period::class),
-            ],
-            security: 'is_fully_authenticated()',
-        ),
     ],
     denormalizationContext: ['groups' => ['write']],
     normalizationContext: ['groups' => ['read']],
@@ -51,8 +43,6 @@
 #[ORM\Entity(repositoryClass: DayRepository::class)]
 #[ORM\UniqueConstraint(name: 'offset_period_idx', columns: ['periodId', 'dayOffset'])]
 class Day extends BaseEntity implements BelongsToCampInterface {
-    public const PERIOD_SUBRESOURCE_URI_TEMPLATE = '/periods/{periodId}/days{._format}';
-
     public const ITEM_NORMALIZATION_CONTEXT = [
         'groups' => [
             'read',
@@ -71,11 +61,7 @@ class Day extends BaseEntity implements BelongsToCampInterface {
     /**
      * The list of people who have a whole-day responsibility on this day.
      */
-    #[ApiProperty(
-        writable: false,
-        uriTemplate: DayResponsible::DAY_SUBRESOURCE_URI_TEMPLATE,
-        example: '/days/1a2b3c4d/day_responsibles'
-    )]
+    #[ApiProperty(writable: false, example: '["/day_responsibles/1a2b3c4d"]')]
     #[Groups(['read'])]
     #[ORM\OneToMany(targetEntity: DayResponsible::class, mappedBy: 'day', orphanRemoval: true)]
     public Collection $dayResponsibles;
@@ -175,10 +161,7 @@ public function getEnd(): ?\DateTime {
     /**
      * @return DayResponsible[]
      */
-    #[ApiProperty(
-        readableLink: true,
-        uriTemplate: DayResponsible::DAY_SUBRESOURCE_URI_TEMPLATE,
-    )]
+    #[ApiProperty(readableLink: true)]
     #[SerializedName('dayResponsibles')]
     #[Groups(['Day:DayResponsibles'])]
     public function getEmbeddedDayResponsibles(): array {
diff --git a/api/src/Entity/DayResponsible.php b/api/src/Entity/DayResponsible.php
index 68448793eb..a4acf15864 100644
--- a/api/src/Entity/DayResponsible.php
+++ b/api/src/Entity/DayResponsible.php
@@ -9,7 +9,6 @@
 use ApiPlatform\Metadata\Delete;
 use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\GetCollection;
-use ApiPlatform\Metadata\Link;
 use ApiPlatform\Metadata\Post;
 use App\Repository\DayResponsibleRepository;
 use App\Validator\AssertBelongsToSameCamp;
@@ -32,13 +31,6 @@
         new GetCollection(
             security: 'is_authenticated()'
         ),
-        new GetCollection(
-            uriTemplate: self::DAY_SUBRESOURCE_URI_TEMPLATE,
-            uriVariables: [
-                'dayId' => new Link(toProperty: 'day', fromClass: Day::class),
-            ],
-            security: 'is_fully_authenticated()',
-        ),
         new Post(
             securityPostDenormalize: 'is_granted("CAMP_MEMBER", object) or is_granted("CAMP_MANAGER", object)'
         ),
@@ -54,8 +46,6 @@
 #[ORM\Entity(repositoryClass: DayResponsibleRepository::class)]
 #[ORM\UniqueConstraint(name: 'day_campCollaboration_unique', columns: ['dayId', 'campCollaborationId'])]
 class DayResponsible extends BaseEntity implements BelongsToCampInterface {
-    public const DAY_SUBRESOURCE_URI_TEMPLATE = '/days/{dayId}/day_responsibles{._format}';
-
     /**
      * The day on which the person is responsible.
      */
diff --git a/api/src/Entity/Period.php b/api/src/Entity/Period.php
index 67f47430fa..f4f768646e 100644
--- a/api/src/Entity/Period.php
+++ b/api/src/Entity/Period.php
@@ -68,11 +68,7 @@ class Period extends BaseEntity implements BelongsToCampInterface {
     /**
      * The days in this time period. These are generated automatically.
      */
-    #[ApiProperty(
-        writable: false,
-        uriTemplate: Day::PERIOD_SUBRESOURCE_URI_TEMPLATE,
-        example: '/periods/1a2b3c4d/days'
-    )]
+    #[ApiProperty(writable: false, example: '["/days?period=/periods/1a2b3c4d"]')]
     #[Groups(['read'])]
     #[ORM\OneToMany(targetEntity: Day::class, mappedBy: 'period', orphanRemoval: true, cascade: ['persist'])]
     #[ORM\OrderBy(['dayOffset' => 'ASC'])]
@@ -84,11 +80,7 @@ class Period extends BaseEntity implements BelongsToCampInterface {
      *
      * @var Collection<int, ScheduleEntry>
      */
-    #[ApiProperty(
-        writable: false,
-        uriTemplate: ScheduleEntry::PERIOD_SUBRESOURCE_URI_TEMPLATE,
-        example: '/periods/1a2b3c4d/schedule_entries'
-    )]
+    #[ApiProperty(writable: false, example: '["/schedule_entries/1a2b3c4d"]')]
     #[Groups(['read'])]
     #[ORM\OneToMany(targetEntity: ScheduleEntry::class, mappedBy: 'period')]
     #[ORM\OrderBy(['startOffset' => 'ASC', 'left' => 'ASC', 'endOffset' => 'DESC', 'id' => 'ASC'])]
@@ -186,10 +178,7 @@ public function __construct() {
     /**
      * @return Day[]
      */
-    #[ApiProperty(
-        readableLink: true,
-        uriTemplate: Day::PERIOD_SUBRESOURCE_URI_TEMPLATE,
-    )]
+    #[ApiProperty(readableLink: true)]
     #[SerializedName('days')]
     #[Groups('Period:Days')]
     public function getEmbeddedDays(): array {
diff --git a/api/src/Entity/ScheduleEntry.php b/api/src/Entity/ScheduleEntry.php
index 679d8acf0f..d526998ff6 100644
--- a/api/src/Entity/ScheduleEntry.php
+++ b/api/src/Entity/ScheduleEntry.php
@@ -9,7 +9,6 @@
 use ApiPlatform\Metadata\Delete;
 use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\GetCollection;
-use ApiPlatform\Metadata\Link;
 use ApiPlatform\Metadata\Patch;
 use ApiPlatform\Metadata\Post;
 use App\Doctrine\Filter\ExpressionDateTimeFilter;
@@ -43,13 +42,6 @@
         new GetCollection(
             security: 'is_authenticated()'
         ),
-        new GetCollection(
-            uriTemplate: self::PERIOD_SUBRESOURCE_URI_TEMPLATE,
-            uriVariables: [
-                'periodId' => new Link(toProperty: 'period', fromClass: Period::class),
-            ],
-            security: 'is_fully_authenticated()',
-        ),
         new Post(
             denormalizationContext: ['groups' => ['write', 'create']],
             normalizationContext: self::ITEM_NORMALIZATION_CONTEXT,
@@ -69,8 +61,6 @@
 #[ORM\Index(columns: ['startOffset'])]
 #[ORM\Index(columns: ['endOffset'])]
 class ScheduleEntry extends BaseEntity implements BelongsToCampInterface {
-    public const PERIOD_SUBRESOURCE_URI_TEMPLATE = '/periods/{periodId}/schedule_entries{._format}';
-
     public const ITEM_NORMALIZATION_CONTEXT = [
         'groups' => ['read', 'ScheduleEntry:Activity'],
         'swagger_definition_name' => 'read',
diff --git a/api/tests/Api/DayResponsibles/ListDayResponsiblesTest.php b/api/tests/Api/DayResponsibles/ListDayResponsiblesTest.php
index f6ef4097c3..0ff94edf5b 100644
--- a/api/tests/Api/DayResponsibles/ListDayResponsiblesTest.php
+++ b/api/tests/Api/DayResponsibles/ListDayResponsiblesTest.php
@@ -101,34 +101,4 @@ public function testListDayResponsiblesFilteredByDayInCampPrototypeIsAllowedForU
             ['href' => $this->getIriFor('dayResponsible1day1period1campPrototype')],
         ], $response->toArray()['_links']['items']);
     }
-
-    public function testListDayResponsiblesAsDaySubresourceIsAllowedForCollaborator() {
-        $day = static::getFixture('day1period1');
-        $response = static::createClientWithCredentials()->request('GET', '/days/'.$day->getId().'/day_responsibles');
-        $this->assertResponseStatusCodeSame(200);
-        $this->assertJsonContains([
-            'totalItems' => 1,
-            '_links' => [
-                'items' => [],
-            ],
-            '_embedded' => [
-                'items' => [],
-            ],
-        ]);
-        $this->assertEqualsCanonicalizing([
-            ['href' => $this->getIriFor('dayResponsible1')],
-        ], $response->toArray()['_links']['items']);
-    }
-
-    public function testListDayResponsiblesAsDaySubresourceIsDeniedForUnrelatedUser() {
-        $day = static::getFixture('day1period1');
-        $response = static::createClientWithCredentials(['email' => static::$fixtures['user4unrelated']->getEmail()])
-            ->request('GET', '/days/'.$day->getId().'/day_responsibles')
-        ;
-
-        $this->assertResponseStatusCodeSame(200);
-
-        $this->assertJsonContains(['totalItems' => 0]);
-        $this->assertArrayNotHasKey('items', $response->toArray()['_links']);
-    }
 }
diff --git a/api/tests/Api/Days/ListDaysTest.php b/api/tests/Api/Days/ListDaysTest.php
index 8c97ed6ae1..3962596481 100644
--- a/api/tests/Api/Days/ListDaysTest.php
+++ b/api/tests/Api/Days/ListDaysTest.php
@@ -122,36 +122,4 @@ public function testListDaysFilteredByPeriodInCampPrototypeIsAllowedForCollabora
             ['href' => $this->getIriFor('day1period1campPrototype')],
         ], $response->toArray()['_links']['items']);
     }
-
-    public function testListDaysAsPeriodSubresourceIsAllowedForCollaborator() {
-        $period = static::getFixture('period1');
-        $response = static::createClientWithCredentials()->request('GET', '/periods/'.$period->getId().'/days');
-        $this->assertResponseStatusCodeSame(200);
-        $this->assertJsonContains([
-            'totalItems' => 3,
-            '_links' => [
-                'items' => [],
-            ],
-            '_embedded' => [
-                'items' => [],
-            ],
-        ]);
-        $this->assertEqualsCanonicalizing([
-            ['href' => $this->getIriFor('day1period1')],
-            ['href' => $this->getIriFor('day2period1')],
-            ['href' => $this->getIriFor('day3period1')],
-        ], $response->toArray()['_links']['items']);
-    }
-
-    public function testListDaysAsPeriodSubresourceIsDeniedForUnrelatedUser() {
-        $period = static::getFixture('period1');
-        $response = static::createClientWithCredentials(['email' => static::$fixtures['user4unrelated']->getEmail()])
-            ->request('GET', '/periods/'.$period->getId().'/days')
-        ;
-
-        $this->assertResponseStatusCodeSame(200);
-
-        $this->assertJsonContains(['totalItems' => 0]);
-        $this->assertArrayNotHasKey('items', $response->toArray()['_links']);
-    }
 }
diff --git a/api/tests/Api/Days/ReadDayTest.php b/api/tests/Api/Days/ReadDayTest.php
index 306334cdbb..a43af3a9d4 100644
--- a/api/tests/Api/Days/ReadDayTest.php
+++ b/api/tests/Api/Days/ReadDayTest.php
@@ -62,7 +62,7 @@ public function testGetSingleDayIsAllowedForGuest() {
             '_links' => [
                 'period' => ['href' => $this->getIriFor('period1')],
                 'scheduleEntries' => ['href' => '/schedule_entries?period=%2Fperiods%2F'.$day->period->getId().'&start%5Bstrictly_before%5D='.urlencode($end).'&end%5Bafter%5D='.urlencode($start)],
-                'dayResponsibles' => ['href' => '/days/'.$day->getId().'/day_responsibles'],
+                'dayResponsibles' => ['href' => '/day_responsibles?day=%2Fdays%2F'.$day->getId()],
             ],
         ]);
     }
@@ -83,7 +83,7 @@ public function testGetSingleDayIsAllowedForMember() {
             '_links' => [
                 'period' => ['href' => $this->getIriFor('period1')],
                 'scheduleEntries' => ['href' => '/schedule_entries?period=%2Fperiods%2F'.$day->period->getId().'&start%5Bstrictly_before%5D='.urlencode($end).'&end%5Bafter%5D='.urlencode($start)],
-                'dayResponsibles' => ['href' => '/days/'.$day->getId().'/day_responsibles'],
+                'dayResponsibles' => ['href' => '/day_responsibles?day=%2Fdays%2F'.$day->getId()],
             ],
         ]);
     }
@@ -102,7 +102,7 @@ public function testGetSingleDayIsAllowedForManager() {
             '_links' => [
                 'period' => ['href' => $this->getIriFor('period1')],
                 'scheduleEntries' => ['href' => '/schedule_entries?period=%2Fperiods%2F'.$day->period->getId().'&start%5Bstrictly_before%5D='.urlencode($end).'&end%5Bafter%5D='.urlencode($start)],
-                'dayResponsibles' => ['href' => '/days/'.$day->getId().'/day_responsibles'],
+                'dayResponsibles' => ['href' => '/day_responsibles?day=%2Fdays%2F'.$day->getId()],
             ],
         ]);
     }
@@ -121,7 +121,7 @@ public function testGetSingleDayFromCampPrototypeIsAllowedForUnrelatedUser() {
             '_links' => [
                 'period' => ['href' => $this->getIriFor('period1campPrototype')],
                 'scheduleEntries' => ['href' => '/schedule_entries?period=%2Fperiods%2F'.$day->period->getId().'&start%5Bstrictly_before%5D='.urlencode($end).'&end%5Bafter%5D='.urlencode($start)],
-                'dayResponsibles' => ['href' => '/days/'.$day->getId().'/day_responsibles'],
+                'dayResponsibles' => ['href' => '/day_responsibles?day=%2Fdays%2F'.$day->getId()],
             ],
         ]);
     }
diff --git a/api/tests/Api/Periods/ReadPeriodTest.php b/api/tests/Api/Periods/ReadPeriodTest.php
index fd32d9febc..d382408357 100644
--- a/api/tests/Api/Periods/ReadPeriodTest.php
+++ b/api/tests/Api/Periods/ReadPeriodTest.php
@@ -62,8 +62,8 @@ public function testGetSinglePeriodIsAllowedForGuest() {
             '_links' => [
                 'camp' => ['href' => $this->getIriFor('camp1')],
                 'materialItems' => ['href' => '/material_items?period=%2Fperiods%2F'.$period->getId()],
-                'days' => ['href' => '/periods/'.$period->getId().'/days'],
-                'scheduleEntries' => ['href' => '/periods/'.$period->getId().'/schedule_entries'],
+                'days' => ['href' => '/days?period=%2Fperiods%2F'.$period->getId()],
+                'scheduleEntries' => ['href' => '/schedule_entries?period=%2Fperiods%2F'.$period->getId()],
                 'contentNodes' => ['href' => '/content_nodes?period=%2Fperiods%2F'.$period->getId()],
                 'dayResponsibles' => ['href' => '/day_responsibles?day.period=%2Fperiods%2F'.$period->getId()],
             ],
@@ -86,8 +86,8 @@ public function testGetSinglePeriodIsAllowedForMember() {
             '_links' => [
                 'camp' => ['href' => $this->getIriFor('camp1')],
                 'materialItems' => ['href' => '/material_items?period=%2Fperiods%2F'.$period->getId()],
-                'days' => ['href' => '/periods/'.$period->getId().'/days'],
-                'scheduleEntries' => ['href' => '/periods/'.$period->getId().'/schedule_entries'],
+                'days' => ['href' => '/days?period=%2Fperiods%2F'.$period->getId()],
+                'scheduleEntries' => ['href' => '/schedule_entries?period=%2Fperiods%2F'.$period->getId()],
             ],
         ]);
     }
@@ -105,8 +105,8 @@ public function testGetSinglePeriodIsAllowedForManager() {
             '_links' => [
                 'camp' => ['href' => $this->getIriFor('camp1')],
                 'materialItems' => ['href' => '/material_items?period=%2Fperiods%2F'.$period->getId()],
-                'days' => ['href' => '/periods/'.$period->getId().'/days'],
-                'scheduleEntries' => ['href' => '/periods/'.$period->getId().'/schedule_entries'],
+                'days' => ['href' => '/days?period=%2Fperiods%2F'.$period->getId()],
+                'scheduleEntries' => ['href' => '/schedule_entries?period=%2Fperiods%2F'.$period->getId()],
             ],
         ]);
     }
diff --git a/api/tests/Api/ScheduleEntries/ListScheduleEntriesTest.php b/api/tests/Api/ScheduleEntries/ListScheduleEntriesTest.php
index 8bd4a298aa..65189423d2 100644
--- a/api/tests/Api/ScheduleEntries/ListScheduleEntriesTest.php
+++ b/api/tests/Api/ScheduleEntries/ListScheduleEntriesTest.php
@@ -375,36 +375,4 @@ public function testListScheduleEntriesFilteredByInvalidEndDoesntFilter() {
             ['href' => $this->getIriFor('scheduleEntry2period1campPrototype')],
         ], $response->toArray()['_links']['items']);
     }
-
-    public function testListScheduleEntriesAsPeriodSubresourceIsAllowedForCollaborator() {
-        $period = static::getFixture('period1');
-        $response = static::createClientWithCredentials()->request('GET', '/periods/'.$period->getId().'/schedule_entries');
-        $this->assertResponseStatusCodeSame(200);
-        $this->assertJsonContains([
-            'totalItems' => 3,
-            '_links' => [
-                'items' => [],
-            ],
-            '_embedded' => [
-                'items' => [],
-            ],
-        ]);
-        $this->assertEqualsCanonicalizing([
-            ['href' => $this->getIriFor('scheduleEntry1')],
-            ['href' => $this->getIriFor('scheduleEntry2')],
-            ['href' => $this->getIriFor('scheduleEntry1period1camp1')],
-        ], $response->toArray()['_links']['items']);
-    }
-
-    public function testListScheduleEntriesAsPeriodSubresourceIsDeniedForUnrelatedUser() {
-        $period = static::getFixture('period1');
-        $response = static::createClientWithCredentials(['email' => static::$fixtures['user4unrelated']->getEmail()])
-            ->request('GET', '/periods/'.$period->getId().'/schedule_entries')
-        ;
-
-        $this->assertResponseStatusCodeSame(200);
-
-        $this->assertJsonContains(['totalItems' => 0]);
-        $this->assertArrayNotHasKey('items', $response->toArray()['_links']);
-    }
 }
diff --git a/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testOpenApiSpecMatchesSnapshot__1.yml b/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testOpenApiSpecMatchesSnapshot__1.yml
index d1fa6836a2..7ff127bad6 100644
--- a/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testOpenApiSpecMatchesSnapshot__1.yml
+++ b/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testOpenApiSpecMatchesSnapshot__1.yml
@@ -13231,13 +13231,9 @@ components:
           example: test
           type: string
       type: object
-    Day-read:
+    Day-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User:
       deprecated: false
-      description: |-
-        A day in a time period of a camp. This is represented as a reference to the time period
-        along with a number of days offset from the period's starting date. This is to make it
-        easier to move the whole periods to different dates. Days are created automatically when
-        creating or updating periods, and are not writable through the API directly.
+      description: ''
       properties:
         dayOffset:
           description: "The 0-based offset in days from the period's start date when this day starts."
@@ -13246,71 +13242,13 @@ components:
           type: integer
         dayResponsibles:
           description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
-          readOnly: true
-          type: string
-        end:
-          description: 'The end date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-03T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-        id:
-          description: 'An internal, unique, randomly generated identifier of this entity.'
-          example: 1a2b3c4d
-          maxLength: 16
-          readOnly: true
-          type: string
-        number:
-          description: 'The 1-based cardinal number of the day in the period. Not unique within the camp.'
-          example: '2'
-          readOnly: true
-          type: integer
-        period:
-          description: 'The time period that this day belongs to.'
-          example: /periods/1a2b3c4d
-          format: iri-reference
-          type: string
-        scheduleEntries:
-          description: "All scheduleEntries in this day's period which overlap with this day (using midnight as cutoff)."
-          example: '/schedule_entries?period=%2Fperiods%2F1a2b3c4d&start%5Bstrictly_before%5D=2022-01-03T00%3A00%3A00%2B00%3A00&end%5Bafter%5D=2022-01-02T00%3A00%3A00%2B00%3A00'
+          example: '["/day_responsibles/1a2b3c4d"]'
           items:
             example: 'https://example.com/'
             format: iri-reference
             type: string
           readOnly: true
           type: array
-        start:
-          description: 'The start date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-02T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-      required:
-        - dayOffset
-        - dayResponsibles
-        - period
-      type: object
-    Day-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User:
-      deprecated: false
-      description: ''
-      properties:
-        dayOffset:
-          description: "The 0-based offset in days from the period's start date when this day starts."
-          example: '1'
-          readOnly: true
-          type: integer
-        dayResponsibles:
-          description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
-          readOnly: true
-          type: string
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13374,7 +13312,7 @@ components:
           items:
             $ref: '#/components/schemas/DayResponsible-read_Day.DayResponsibles'
           readOnly: true
-          type: unknown_type
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13432,75 +13370,13 @@ components:
           type: integer
         dayResponsibles:
           description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
-          readOnly: true
-          type: string
-        end:
-          description: 'The end date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-03T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-        id:
-          description: 'An internal, unique, randomly generated identifier of this entity.'
-          example: 1a2b3c4d
-          maxLength: 16
-          readOnly: true
-          type: string
-        number:
-          description: 'The 1-based cardinal number of the day in the period. Not unique within the camp.'
-          example: '2'
-          readOnly: true
-          type: integer
-        period:
-          description: 'The time period that this day belongs to.'
-          example: /periods/1a2b3c4d
-          format: iri-reference
-          type: string
-        scheduleEntries:
-          description: "All scheduleEntries in this day's period which overlap with this day (using midnight as cutoff)."
-          example: '/schedule_entries?period=%2Fperiods%2F1a2b3c4d&start%5Bstrictly_before%5D=2022-01-03T00%3A00%3A00%2B00%3A00&end%5Bafter%5D=2022-01-02T00%3A00%3A00%2B00%3A00'
+          example: '["/day_responsibles/1a2b3c4d"]'
           items:
             example: 'https://example.com/'
             format: iri-reference
             type: string
           readOnly: true
           type: array
-        start:
-          description: 'The start date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-02T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-      required:
-        - dayOffset
-        - dayResponsibles
-        - period
-      type: object
-    Day.jsonapi-read:
-      deprecated: false
-      description: |-
-        A day in a time period of a camp. This is represented as a reference to the time period
-        along with a number of days offset from the period's starting date. This is to make it
-        easier to move the whole periods to different dates. Days are created automatically when
-        creating or updating periods, and are not writable through the API directly.
-      properties:
-        dayOffset:
-          description: "The 0-based offset in days from the period's start date when this day starts."
-          example: '1'
-          readOnly: true
-          type: integer
-        dayResponsibles:
-          description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
-          readOnly: true
-          type: string
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13558,10 +13434,13 @@ components:
           type: integer
         dayResponsibles:
           description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
+          example: '["/day_responsibles/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13625,7 +13504,7 @@ components:
           items:
             $ref: '#/components/schemas/DayResponsible.jsonapi-read_Day.DayResponsibles'
           readOnly: true
-          type: unknown_type
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13683,10 +13562,13 @@ components:
           type: integer
         dayResponsibles:
           description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
+          example: '["/day_responsibles/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13733,13 +13615,9 @@ components:
         - dayResponsibles
         - period
       type: object
-    Day.jsonhal-read:
+    Day.jsonhal-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User:
       deprecated: false
-      description: |-
-        A day in a time period of a camp. This is represented as a reference to the time period
-        along with a number of days offset from the period's starting date. This is to make it
-        easier to move the whole periods to different dates. Days are created automatically when
-        creating or updating periods, and are not writable through the API directly.
+      description: ''
       properties:
         _links:
           properties:
@@ -13757,10 +13635,13 @@ components:
           type: integer
         dayResponsibles:
           description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
+          example: '["/day_responsibles/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13807,9 +13688,13 @@ components:
         - dayResponsibles
         - period
       type: object
-    Day.jsonhal-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User:
+    Day.jsonhal-read_Day.DayResponsibles:
       deprecated: false
-      description: ''
+      description: |-
+        A day in a time period of a camp. This is represented as a reference to the time period
+        along with a number of days offset from the period's starting date. This is to make it
+        easier to move the whole periods to different dates. Days are created automatically when
+        creating or updating periods, and are not writable through the API directly.
       properties:
         _links:
           properties:
@@ -13826,11 +13711,10 @@ components:
           readOnly: true
           type: integer
         dayResponsibles:
-          description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
+          items:
+            $ref: '#/components/schemas/DayResponsible.jsonhal-read_Day.DayResponsibles'
           readOnly: true
-          type: string
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13877,13 +13761,9 @@ components:
         - dayResponsibles
         - period
       type: object
-    Day.jsonhal-read_Day.DayResponsibles:
+    Day.jsonhal-read_Period.Camp_Period.Days:
       deprecated: false
-      description: |-
-        A day in a time period of a camp. This is represented as a reference to the time period
-        along with a number of days offset from the period's starting date. This is to make it
-        easier to move the whole periods to different dates. Days are created automatically when
-        creating or updating periods, and are not writable through the API directly.
+      description: ''
       properties:
         _links:
           properties:
@@ -13900,10 +13780,14 @@ components:
           readOnly: true
           type: integer
         dayResponsibles:
+          description: 'The list of people who have a whole-day responsibility on this day.'
+          example: '["/day_responsibles/1a2b3c4d"]'
           items:
-            $ref: '#/components/schemas/DayResponsible.jsonhal-read_Day.DayResponsibles'
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: unknown_type
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -13950,19 +13834,33 @@ components:
         - dayResponsibles
         - period
       type: object
-    Day.jsonhal-read_Period.Camp_Period.Days:
+    Day.jsonld-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User:
       deprecated: false
       description: ''
       properties:
-        _links:
-          properties:
-            self:
+        '@context':
+          oneOf:
+            -
+              additionalProperties: true
               properties:
-                href:
-                  format: iri-reference
+                '@vocab':
                   type: string
+                hydra:
+                  enum: ['http://www.w3.org/ns/hydra/core#']
+                  type: string
+              required:
+                - '@vocab'
+                - hydra
               type: object
-          type: object
+            -
+              type: string
+          readOnly: true
+        '@id':
+          readOnly: true
+          type: string
+        '@type':
+          readOnly: true
+          type: string
         dayOffset:
           description: "The 0-based offset in days from the period's start date when this day starts."
           example: '1'
@@ -13970,10 +13868,13 @@ components:
           type: integer
         dayResponsibles:
           description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
+          example: '["/day_responsibles/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -14020,7 +13921,7 @@ components:
         - dayResponsibles
         - period
       type: object
-    Day.jsonld-read:
+    Day.jsonld-read_Day.DayResponsibles:
       deprecated: false
       description: |-
         A day in a time period of a camp. This is represented as a reference to the time period
@@ -14028,6 +13929,23 @@ components:
         easier to move the whole periods to different dates. Days are created automatically when
         creating or updating periods, and are not writable through the API directly.
       properties:
+        '@context':
+          oneOf:
+            -
+              additionalProperties: true
+              properties:
+                '@vocab':
+                  type: string
+                hydra:
+                  enum: ['http://www.w3.org/ns/hydra/core#']
+                  type: string
+              required:
+                - '@vocab'
+                - hydra
+              type: object
+            -
+              type: string
+          readOnly: true
         '@id':
           readOnly: true
           type: string
@@ -14040,11 +13958,10 @@ components:
           readOnly: true
           type: integer
         dayResponsibles:
-          description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
+          items:
+            $ref: '#/components/schemas/DayResponsible.jsonld-read_Day.DayResponsibles'
           readOnly: true
-          type: string
+          type: array
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -14091,7 +14008,7 @@ components:
         - dayResponsibles
         - period
       type: object
-    Day.jsonld-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User:
+    Day.jsonld-read_Period.Camp_Period.Days:
       deprecated: false
       description: ''
       properties:
@@ -14125,181 +14042,13 @@ components:
           type: integer
         dayResponsibles:
           description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
-          readOnly: true
-          type: string
-        end:
-          description: 'The end date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-03T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-        id:
-          description: 'An internal, unique, randomly generated identifier of this entity.'
-          example: 1a2b3c4d
-          maxLength: 16
-          readOnly: true
-          type: string
-        number:
-          description: 'The 1-based cardinal number of the day in the period. Not unique within the camp.'
-          example: '2'
-          readOnly: true
-          type: integer
-        period:
-          description: 'The time period that this day belongs to.'
-          example: /periods/1a2b3c4d
-          format: iri-reference
-          type: string
-        scheduleEntries:
-          description: "All scheduleEntries in this day's period which overlap with this day (using midnight as cutoff)."
-          example: '/schedule_entries?period=%2Fperiods%2F1a2b3c4d&start%5Bstrictly_before%5D=2022-01-03T00%3A00%3A00%2B00%3A00&end%5Bafter%5D=2022-01-02T00%3A00%3A00%2B00%3A00'
-          items:
-            example: 'https://example.com/'
-            format: iri-reference
-            type: string
-          readOnly: true
-          type: array
-        start:
-          description: 'The start date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-02T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-      required:
-        - dayOffset
-        - dayResponsibles
-        - period
-      type: object
-    Day.jsonld-read_Day.DayResponsibles:
-      deprecated: false
-      description: |-
-        A day in a time period of a camp. This is represented as a reference to the time period
-        along with a number of days offset from the period's starting date. This is to make it
-        easier to move the whole periods to different dates. Days are created automatically when
-        creating or updating periods, and are not writable through the API directly.
-      properties:
-        '@context':
-          oneOf:
-            -
-              additionalProperties: true
-              properties:
-                '@vocab':
-                  type: string
-                hydra:
-                  enum: ['http://www.w3.org/ns/hydra/core#']
-                  type: string
-              required:
-                - '@vocab'
-                - hydra
-              type: object
-            -
-              type: string
-          readOnly: true
-        '@id':
-          readOnly: true
-          type: string
-        '@type':
-          readOnly: true
-          type: string
-        dayOffset:
-          description: "The 0-based offset in days from the period's start date when this day starts."
-          example: '1'
-          readOnly: true
-          type: integer
-        dayResponsibles:
-          items:
-            $ref: '#/components/schemas/DayResponsible.jsonld-read_Day.DayResponsibles'
-          readOnly: true
-          type: unknown_type
-        end:
-          description: 'The end date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-03T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-        id:
-          description: 'An internal, unique, randomly generated identifier of this entity.'
-          example: 1a2b3c4d
-          maxLength: 16
-          readOnly: true
-          type: string
-        number:
-          description: 'The 1-based cardinal number of the day in the period. Not unique within the camp.'
-          example: '2'
-          readOnly: true
-          type: integer
-        period:
-          description: 'The time period that this day belongs to.'
-          example: /periods/1a2b3c4d
-          format: iri-reference
-          type: string
-        scheduleEntries:
-          description: "All scheduleEntries in this day's period which overlap with this day (using midnight as cutoff)."
-          example: '/schedule_entries?period=%2Fperiods%2F1a2b3c4d&start%5Bstrictly_before%5D=2022-01-03T00%3A00%3A00%2B00%3A00&end%5Bafter%5D=2022-01-02T00%3A00%3A00%2B00%3A00'
-          items:
-            example: 'https://example.com/'
-            format: iri-reference
-            type: string
+          example: '["/day_responsibles/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
           type: array
-        start:
-          description: 'The start date and time of the day. This is a read-only convenience property.'
-          example: '2022-01-02T00:00:00+00:00'
-          format: date
-          readOnly: true
-          type:
-            - 'null'
-            - string
-      required:
-        - dayOffset
-        - dayResponsibles
-        - period
-      type: object
-    Day.jsonld-read_Period.Camp_Period.Days:
-      deprecated: false
-      description: ''
-      properties:
-        '@context':
-          oneOf:
-            -
-              additionalProperties: true
-              properties:
-                '@vocab':
-                  type: string
-                hydra:
-                  enum: ['http://www.w3.org/ns/hydra/core#']
-                  type: string
-              required:
-                - '@vocab'
-                - hydra
-              type: object
-            -
-              type: string
-          readOnly: true
-        '@id':
-          readOnly: true
-          type: string
-        '@type':
-          readOnly: true
-          type: string
-        dayOffset:
-          description: "The 0-based offset in days from the period's start date when this day starts."
-          example: '1'
-          readOnly: true
-          type: integer
-        dayResponsibles:
-          description: 'The list of people who have a whole-day responsibility on this day.'
-          example: /days/1a2b3c4d/day_responsibles
-          format: iri-reference
-          readOnly: true
-          type: string
         end:
           description: 'The end date and time of the day. This is a read-only convenience property.'
           example: '2022-01-03T00:00:00+00:00'
@@ -17270,10 +17019,13 @@ components:
           type: array
         days:
           description: 'The days in this time period. These are generated automatically.'
-          example: /periods/1a2b3c4d/days
-          format: iri-reference
+          example: '["/days?period=/periods/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -17309,10 +17061,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -17358,7 +17113,7 @@ components:
           items:
             $ref: '#/components/schemas/Day-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -17394,10 +17149,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -17447,7 +17205,7 @@ components:
           items:
             $ref: '#/components/schemas/Day-read_Period.Camp_Period.Days'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -17483,10 +17241,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -17614,10 +17375,13 @@ components:
           type: array
         days:
           description: 'The days in this time period. These are generated automatically.'
-          example: /periods/1a2b3c4d/days
-          format: iri-reference
+          example: '["/days?period=/periods/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -17653,10 +17417,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -17702,7 +17469,7 @@ components:
           items:
             $ref: '#/components/schemas/Day.jsonapi-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -17738,10 +17505,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -17791,7 +17561,7 @@ components:
           items:
             $ref: '#/components/schemas/Day.jsonapi-read_Period.Camp_Period.Days'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -17827,10 +17597,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -17967,10 +17740,13 @@ components:
           type: array
         days:
           description: 'The days in this time period. These are generated automatically.'
-          example: /periods/1a2b3c4d/days
-          format: iri-reference
+          example: '["/days?period=/periods/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -18006,10 +17782,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -18064,7 +17843,7 @@ components:
           items:
             $ref: '#/components/schemas/Day.jsonhal-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -18100,10 +17879,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -18162,7 +17944,7 @@ components:
           items:
             $ref: '#/components/schemas/Day.jsonhal-read_Period.Camp_Period.Days'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -18198,11 +17980,14 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
-          readOnly: true
-          type: string
-        start:
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
+          readOnly: true
+          type: array
+        start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
           format: date
@@ -18323,10 +18108,13 @@ components:
           type: array
         days:
           description: 'The days in this time period. These are generated automatically.'
-          example: /periods/1a2b3c4d/days
-          format: iri-reference
+          example: '["/days?period=/periods/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -18362,10 +18150,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -18434,7 +18225,7 @@ components:
           items:
             $ref: '#/components/schemas/Day.jsonld-read_Camp.Periods_Period.Days_Camp.CampCollaborations_CampCollaboration.User'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -18470,10 +18261,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -18546,7 +18340,7 @@ components:
           items:
             $ref: '#/components/schemas/Day.jsonld-read_Period.Camp_Period.Days'
           readOnly: true
-          type: unknown_type
+          type: array
         description:
           description: 'A free text name for the period. Useful to distinguish multiple periods in the same camp.'
           example: Hauptlager
@@ -18582,10 +18376,13 @@ components:
           description: |-
             All time slots for programme that are part of this time period. A schedule entry
             may span over multiple days, but may not end later than the period.
-          example: /periods/1a2b3c4d/schedule_entries
-          format: iri-reference
+          example: '["/schedule_entries/1a2b3c4d"]'
+          items:
+            example: 'https://example.com/'
+            format: iri-reference
+            type: string
           readOnly: true
-          type: string
+          type: array
         start:
           description: 'The day on which the period starts, as an ISO date string. Should not be after "end".'
           example: '2022-01-01'
@@ -29349,120 +29146,6 @@ paths:
       tags:
         - Day
     parameters: []
-  '/days/{dayId}/day_responsibles':
-    get:
-      deprecated: false
-      description: 'Retrieves the collection of DayResponsible resources.'
-      operationId: api_days_dayIdday_responsibles_get_collection
-      parameters:
-        -
-          allowEmptyValue: false
-          allowReserved: false
-          deprecated: false
-          description: 'DayResponsible identifier'
-          explode: false
-          in: path
-          name: dayId
-          required: true
-          schema:
-            type: string
-          style: simple
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: day
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: day.period
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: true
-          in: query
-          name: 'day.period[]'
-          required: false
-          schema:
-            items:
-              type: string
-            type: array
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: true
-          in: query
-          name: 'day[]'
-          required: false
-          schema:
-            items:
-              type: string
-            type: array
-          style: form
-      responses:
-        200:
-          content:
-            application/hal+json:
-              schema:
-                properties:
-                  _embedded: { anyOf: [{ properties: { item: { items: { $ref: '#/components/schemas/DayResponsible.jsonhal-read' }, type: array } }, type: object }, { type: object }] }
-                  _links: { properties: { first: { properties: { href: { format: iri-reference, type: string } }, type: object }, last: { properties: { href: { format: iri-reference, type: string } }, type: object }, next: { properties: { href: { format: iri-reference, type: string } }, type: object }, previous: { properties: { href: { format: iri-reference, type: string } }, type: object }, self: { properties: { href: { format: iri-reference, type: string } }, type: object } }, type: object }
-                  itemsPerPage: { minimum: 0, type: integer }
-                  totalItems: { minimum: 0, type: integer }
-                required:
-                  - _embedded
-                  - _links
-                type: object
-            application/json:
-              schema:
-                items:
-                  $ref: '#/components/schemas/DayResponsible-read'
-                type: array
-            application/ld+json:
-              schema:
-                properties:
-                  'hydra:member': { items: { $ref: '#/components/schemas/DayResponsible.jsonld-read' }, type: array }
-                  'hydra:search': { properties: { '@type': { type: string }, 'hydra:mapping': { items: { properties: { '@type': { type: string }, property: { type: ['null', string] }, required: { type: boolean }, variable: { type: string } }, type: object }, type: array }, 'hydra:template': { type: string }, 'hydra:variableRepresentation': { type: string } }, type: object }
-                  'hydra:totalItems': { minimum: 0, type: integer }
-                  'hydra:view': { example: { '@id': string, 'hydra:first': string, 'hydra:last': string, 'hydra:next': string, 'hydra:previous': string, type: string }, properties: { '@id': { format: iri-reference, type: string }, '@type': { type: string }, 'hydra:first': { format: iri-reference, type: string }, 'hydra:last': { format: iri-reference, type: string }, 'hydra:next': { format: iri-reference, type: string }, 'hydra:previous': { format: iri-reference, type: string } }, type: object }
-                required:
-                  - 'hydra:member'
-                type: object
-            application/vnd.api+json:
-              schema:
-                items:
-                  $ref: '#/components/schemas/DayResponsible.jsonapi-read'
-                type: array
-            text/html:
-              schema:
-                items:
-                  $ref: '#/components/schemas/DayResponsible-read'
-                type: array
-          description: 'DayResponsible collection'
-      summary: 'Retrieves the collection of DayResponsible resources.'
-      tags:
-        - DayResponsible
-    parameters: []
   '/days/{id}':
     get:
       deprecated: false
@@ -30456,330 +30139,6 @@ paths:
       summary: 'Updates the Period resource.'
       tags:
         - Period
-  '/periods/{periodId}/days':
-    get:
-      deprecated: false
-      description: 'Retrieves the collection of Day resources.'
-      operationId: api_periods_periodIddays_get_collection
-      parameters:
-        -
-          allowEmptyValue: false
-          allowReserved: false
-          deprecated: false
-          description: 'Day identifier'
-          explode: false
-          in: path
-          name: periodId
-          required: true
-          schema:
-            type: string
-          style: simple
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: period
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: period.camp
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: true
-          in: query
-          name: 'period.camp[]'
-          required: false
-          schema:
-            items:
-              type: string
-            type: array
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: true
-          in: query
-          name: 'period[]'
-          required: false
-          schema:
-            items:
-              type: string
-            type: array
-          style: form
-      responses:
-        200:
-          content:
-            application/hal+json:
-              schema:
-                properties:
-                  _embedded: { anyOf: [{ properties: { item: { items: { $ref: '#/components/schemas/Day.jsonhal-read' }, type: array } }, type: object }, { type: object }] }
-                  _links: { properties: { first: { properties: { href: { format: iri-reference, type: string } }, type: object }, last: { properties: { href: { format: iri-reference, type: string } }, type: object }, next: { properties: { href: { format: iri-reference, type: string } }, type: object }, previous: { properties: { href: { format: iri-reference, type: string } }, type: object }, self: { properties: { href: { format: iri-reference, type: string } }, type: object } }, type: object }
-                  itemsPerPage: { minimum: 0, type: integer }
-                  totalItems: { minimum: 0, type: integer }
-                required:
-                  - _embedded
-                  - _links
-                type: object
-            application/json:
-              schema:
-                items:
-                  $ref: '#/components/schemas/Day-read'
-                type: array
-            application/ld+json:
-              schema:
-                properties:
-                  'hydra:member': { items: { $ref: '#/components/schemas/Day.jsonld-read' }, type: array }
-                  'hydra:search': { properties: { '@type': { type: string }, 'hydra:mapping': { items: { properties: { '@type': { type: string }, property: { type: ['null', string] }, required: { type: boolean }, variable: { type: string } }, type: object }, type: array }, 'hydra:template': { type: string }, 'hydra:variableRepresentation': { type: string } }, type: object }
-                  'hydra:totalItems': { minimum: 0, type: integer }
-                  'hydra:view': { example: { '@id': string, 'hydra:first': string, 'hydra:last': string, 'hydra:next': string, 'hydra:previous': string, type: string }, properties: { '@id': { format: iri-reference, type: string }, '@type': { type: string }, 'hydra:first': { format: iri-reference, type: string }, 'hydra:last': { format: iri-reference, type: string }, 'hydra:next': { format: iri-reference, type: string }, 'hydra:previous': { format: iri-reference, type: string } }, type: object }
-                required:
-                  - 'hydra:member'
-                type: object
-            application/vnd.api+json:
-              schema:
-                items:
-                  $ref: '#/components/schemas/Day.jsonapi-read'
-                type: array
-            text/html:
-              schema:
-                items:
-                  $ref: '#/components/schemas/Day-read'
-                type: array
-          description: 'Day collection'
-      summary: 'Retrieves the collection of Day resources.'
-      tags:
-        - Day
-    parameters: []
-  '/periods/{periodId}/schedule_entries':
-    get:
-      deprecated: false
-      description: 'Retrieves the collection of ScheduleEntry resources.'
-      operationId: api_periods_periodIdschedule_entries_get_collection
-      parameters:
-        -
-          allowEmptyValue: false
-          allowReserved: false
-          deprecated: false
-          description: 'ScheduleEntry identifier'
-          explode: false
-          in: path
-          name: periodId
-          required: true
-          schema:
-            type: string
-          style: simple
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: activity
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'end[after]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'end[before]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'end[strictly_after]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'end[strictly_before]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: period
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'start[after]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'start[before]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'start[strictly_after]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: false
-          in: query
-          name: 'start[strictly_before]'
-          required: false
-          schema:
-            type: string
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: true
-          in: query
-          name: 'activity[]'
-          required: false
-          schema:
-            items:
-              type: string
-            type: array
-          style: form
-        -
-          allowEmptyValue: true
-          allowReserved: false
-          deprecated: false
-          description: ''
-          explode: true
-          in: query
-          name: 'period[]'
-          required: false
-          schema:
-            items:
-              type: string
-            type: array
-          style: form
-      responses:
-        200:
-          content:
-            application/hal+json:
-              schema:
-                properties:
-                  _embedded: { anyOf: [{ properties: { item: { items: { $ref: '#/components/schemas/ScheduleEntry.jsonhal-read' }, type: array } }, type: object }, { type: object }] }
-                  _links: { properties: { first: { properties: { href: { format: iri-reference, type: string } }, type: object }, last: { properties: { href: { format: iri-reference, type: string } }, type: object }, next: { properties: { href: { format: iri-reference, type: string } }, type: object }, previous: { properties: { href: { format: iri-reference, type: string } }, type: object }, self: { properties: { href: { format: iri-reference, type: string } }, type: object } }, type: object }
-                  itemsPerPage: { minimum: 0, type: integer }
-                  totalItems: { minimum: 0, type: integer }
-                required:
-                  - _embedded
-                  - _links
-                type: object
-            application/json:
-              schema:
-                items:
-                  $ref: '#/components/schemas/ScheduleEntry-read'
-                type: array
-            application/ld+json:
-              schema:
-                properties:
-                  'hydra:member': { items: { $ref: '#/components/schemas/ScheduleEntry.jsonld-read' }, type: array }
-                  'hydra:search': { properties: { '@type': { type: string }, 'hydra:mapping': { items: { properties: { '@type': { type: string }, property: { type: ['null', string] }, required: { type: boolean }, variable: { type: string } }, type: object }, type: array }, 'hydra:template': { type: string }, 'hydra:variableRepresentation': { type: string } }, type: object }
-                  'hydra:totalItems': { minimum: 0, type: integer }
-                  'hydra:view': { example: { '@id': string, 'hydra:first': string, 'hydra:last': string, 'hydra:next': string, 'hydra:previous': string, type: string }, properties: { '@id': { format: iri-reference, type: string }, '@type': { type: string }, 'hydra:first': { format: iri-reference, type: string }, 'hydra:last': { format: iri-reference, type: string }, 'hydra:next': { format: iri-reference, type: string }, 'hydra:previous': { format: iri-reference, type: string } }, type: object }
-                required:
-                  - 'hydra:member'
-                type: object
-            application/vnd.api+json:
-              schema:
-                items:
-                  $ref: '#/components/schemas/ScheduleEntry.jsonapi-read'
-                type: array
-            text/html:
-              schema:
-                items:
-                  $ref: '#/components/schemas/ScheduleEntry-read'
-                type: array
-          description: 'ScheduleEntry collection'
-      summary: 'Retrieves the collection of ScheduleEntry resources.'
-      tags:
-        - ScheduleEntry
-    parameters: []
   /personal_invitations:
     get:
       deprecated: false
diff --git a/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testRootEndpointMatchesSnapshot__1.json b/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testRootEndpointMatchesSnapshot__1.json
index a9707dfd02..b99465930a 100644
--- a/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testRootEndpointMatchesSnapshot__1.json
+++ b/api/tests/Api/SnapshotTests/__snapshots__/ResponseSnapshotTest__testRootEndpointMatchesSnapshot__1.json
@@ -37,11 +37,11 @@
             "templated": true
         },
         "dayResponsibles": {
-            "href": "\/day_responsibles{\/id}{\/action}{?day,day[],day.period,day.period[]}",
+            "href": "\/day_responsibles{\/id}{?day,day[],day.period,day.period[]}",
             "templated": true
         },
         "days": {
-            "href": "\/days{\/id}{\/action}{?period,period[],period.camp,period.camp[]}",
+            "href": "\/days{\/id}{?period,period[],period.camp,period.camp[]}",
             "templated": true
         },
         "invitations": {
@@ -88,7 +88,7 @@
             "templated": true
         },
         "personalInvitations": {
-            "href": "\/personal_invitations{\/id}{\/action}",
+            "href": "/personal_invitations{/id}{/action}",
             "templated": true
         },
         "profiles": {
@@ -104,7 +104,7 @@
             "templated": true
         },
         "scheduleEntries": {
-            "href": "\/schedule_entries{\/id}{\/action}{?period,period[],activity,activity[],start[before],start[strictly_before],start[after],start[strictly_after],end[before],end[strictly_before],end[after],end[strictly_after]}",
+            "href": "\/schedule_entries{\/id}{?period,period[],activity,activity[],start[before],start[strictly_before],start[after],start[strictly_after],end[before],end[strictly_before],end[after],end[strictly_after]}",
             "templated": true
         },
         "self": {
diff --git a/api/tests/Api/SnapshotTests/__snapshots__/performance_test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml b/api/tests/Api/SnapshotTests/__snapshots__/performance_test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml
index 2d35e29ac9..2a4072392b 100644
--- a/api/tests/Api/SnapshotTests/__snapshots__/performance_test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml
+++ b/api/tests/Api/SnapshotTests/__snapshots__/performance_test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml
@@ -5,15 +5,15 @@
 /activity_responsibles: 6
 /activity_responsibles/item: 8
 /camps: 39
-/camps/item: 32
+/camps/item: 38
 /camp_collaborations: 25
 /camp_collaborations/item: 25
 /categories: 11
 /categories/item: 9
 /content_types: 6
 /content_types/item: 6
-/days: 26
-/days/item: 12
+/days: 17
+/days/item: 11
 /day_responsibles: 6
 /day_responsibles/item: 9
 /material_items: 207
@@ -21,7 +21,7 @@
 /material_lists: 6
 /material_lists/item: 7
 /periods: 6
-/periods/item: 28
+/periods/item: 29
 /profiles: 6
 /profiles/item: 6
 /schedule_entries: 23
diff --git a/api/tests/Api/SnapshotTests/__snapshots__/test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml b/api/tests/Api/SnapshotTests/__snapshots__/test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml
index 97221dce67..b5d9cd6d16 100644
--- a/api/tests/Api/SnapshotTests/__snapshots__/test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml
+++ b/api/tests/Api/SnapshotTests/__snapshots__/test_EndpointPerformanceTest__testPerformanceDidNotChangeForStableEndpoints__1.yml
@@ -5,15 +5,15 @@
 /activity_responsibles: 6
 /activity_responsibles/item: 8
 /camps: 29
-/camps/item: 22
+/camps/item: 28
 /camp_collaborations: 25
 /camp_collaborations/item: 15
 /categories: 11
 /categories/item: 9
 /content_types: 6
 /content_types/item: 6
-/days: 26
-/days/item: 12
+/days: 17
+/days/item: 11
 /day_responsibles: 6
 /day_responsibles/item: 9
 /material_items: 7
@@ -21,7 +21,7 @@
 /material_lists: 6
 /material_lists/item: 7
 /periods: 6
-/periods/item: 18
+/periods/item: 19
 /profiles: 6
 /profiles/item: 6
 /schedule_entries: 23