diff --git a/CHANGELOG.md b/CHANGELOG.md
index 15a0ab76..f994eb20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,16 @@ This project adheres to semantic versioning.
 
 ### Removed
 
+## [4.4.1] - 2022-06-23
+
+### Added
+- Added range filters for /api/observations `created` datetime field
+
+## [4.4.0] - 2022-06-14
+
+### Changed
+- Fix: accept pending proposal invites on bulk user creation
+
 ## [4.3.3] - 2022-05-31
 
 ### Added
diff --git a/observation_portal/observations/filters.py b/observation_portal/observations/filters.py
index 390874b0..33876a0f 100644
--- a/observation_portal/observations/filters.py
+++ b/observation_portal/observations/filters.py
@@ -45,6 +45,18 @@ class ObservationFilter(mixins.CustomIsoDateTimeFilterMixin, django_filters.Filt
         label='Modified After (Inclusive)',
         widget=forms.TextInput(attrs={'class': 'input', 'type': 'date'})
     )
+    created_after = django_filters.IsoDateTimeFilter(
+        field_name='created',
+        lookup_expr='gte',
+        label='Created After (Inclusive)',
+        widget=forms.TextInput(attrs={'class': 'input', 'type': 'date'})
+    )
+    created_before = django_filters.IsoDateTimeFilter(
+        field_name='created',
+        lookup_expr='lt',
+        label='Created Before',
+        widget=forms.TextInput(attrs={'class': 'input', 'type': 'date'})
+    )
     request_id = django_filters.NumberFilter(field_name='request__id')
     request_group_id = django_filters.NumberFilter(field_name='request__request_group__id', label='Request Group ID')
     state = django_filters.MultipleChoiceFilter(choices=Observation.STATE_CHOICES, field_name='state')