From dd46cc65d7169d74211176d86b7a25159442a1aa Mon Sep 17 00:00:00 2001
From: Paul Holden <paulh@moodle.com>
Date: Tue, 30 Jan 2024 14:32:25 +0000
Subject: [PATCH] MDL-80692 calendar: calculate today relative to users own
 timezone.

Co-authored-by: Archil Abuladze <armiworker@gmail.com>
---
 .../external/calendar_day_exporter.php        | 21 ++++++++-----------
 calendar/classes/external/day_exporter.php    | 15 ++++++-------
 2 files changed, 15 insertions(+), 21 deletions(-)

diff --git a/calendar/classes/external/calendar_day_exporter.php b/calendar/classes/external/calendar_day_exporter.php
index 8772eab3f8e0a..261e042733a45 100644
--- a/calendar/classes/external/calendar_day_exporter.php
+++ b/calendar/classes/external/calendar_day_exporter.php
@@ -14,22 +14,14 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * Contains event class for displaying the day view.
- *
- * @package   core_calendar
- * @copyright 2017 Simey Lameze <simey@moodle.com>
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
 namespace core_calendar\external;
 
-defined('MOODLE_INTERNAL') || die();
-
 use core\external\exporter;
+use core_date;
+use DateTimeImmutable;
 use renderer_base;
 use moodle_url;
-use \core_calendar\local\event\container;
+use core_calendar\local\event\container;
 
 /**
  * Class for displaying the day view.
@@ -209,7 +201,12 @@ protected function get_other_values(renderer_base $output) {
 
         // Need to account for user's timezone.
         $usernow = usergetdate(time());
-        $today = new \DateTimeImmutable();
+        $today = new DateTimeImmutable(
+            timezone: core_date::get_user_timezone_object(),
+        );
+
+        // The start time should use the day's date but the current
+        // time of the day (adjusted for user's timezone).
         $neweventtimestamp = $today->setTimestamp($date[0])->setTime(
             $usernow['hours'],
             $usernow['minutes'],
diff --git a/calendar/classes/external/day_exporter.php b/calendar/classes/external/day_exporter.php
index 377d2cd6e2c97..6d153d1decfaa 100644
--- a/calendar/classes/external/day_exporter.php
+++ b/calendar/classes/external/day_exporter.php
@@ -14,14 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * Contains event class for displaying the day view.
- *
- * @package   core_calendar
- * @copyright 2017 Andrew Nicols <andrew@nicols.co.uk>
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
 namespace core_calendar\external;
 
 defined('MOODLE_INTERNAL') || die();
@@ -29,6 +21,8 @@
 require_once($CFG->dirroot . '/calendar/lib.php');
 
 use core\external\exporter;
+use core_date;
+use DateTimeImmutable;
 use renderer_base;
 use moodle_url;
 
@@ -169,7 +163,10 @@ protected function get_other_values(renderer_base $output) {
         $timestamp = $this->data[0];
         // Need to account for user's timezone.
         $usernow = usergetdate(time());
-        $today = new \DateTimeImmutable();
+        $today = new DateTimeImmutable(
+            timezone: core_date::get_user_timezone_object(),
+        );
+
         // The start time should use the day's date but the current
         // time of the day (adjusted for user's timezone).
         $neweventstarttime = $today->setTimestamp($timestamp)->setTime(