MDL-80499 datafield_date: specify UTC time when editing field content.

lib/outputcomponents.php

@@ -2049,16 +2049,19 @@ class html_writer {
      * @param int $currenttime A default timestamp in GMT
      * @param int $step minute spacing
      * @param array $attributes - html select element attributes
-     * @return HTML fragment
+     * @param float|int|string $timezone the timezone to use to calculate the time
+     *        {@link https://moodledev.io/docs/apis/subsystems/time#timezone}
+     * @return string HTML fragment
      */
-    public static function select_time($type, $name, $currenttime = 0, $step = 5, array $attributes = null) {
+    public static function select_time($type, $name, $currenttime = 0, $step = 5, array $attributes = null, $timezone = 99) {
         global $OUTPUT;
 
         if (!$currenttime) {
             $currenttime = time();
         }
         $calendartype = \core_calendar\type_factory::get_calendar_instance();
-        $currentdate = $calendartype->timestamp_to_date_array($currenttime);
+        $currentdate = $calendartype->timestamp_to_date_array($currenttime, $timezone);
+
         $userdatetype = $type;
         $timeunits = array();
 

lib/upgrade.txt

@@ -1,6 +1,10 @@
 This files describes API changes in core libraries and APIs,
 information provided here is intended especially for developers.
 
+=== 4.3.3 ===
+
+* The `html_writer::select_time` method has a `$timezone` parameter to use when formatting the time parameter
+
 === 4.3.2 ===
 
 * The current page language is available in new `core/config` language property for Javascript modules

mod/data/field/date/field.class.php

@@ -80,9 +80,26 @@ class data_field_date extends data_field_base {
         }
 
         $str = '<div title="'.s($this->field->description).'" class="mod-data-input form-inline">';
-        $dayselector = html_writer::select_time('days', 'field_'.$this->field->id.'_day', $content);
-        $monthselector = html_writer::select_time('months', 'field_'.$this->field->id.'_month', $content);
-        $yearselector = html_writer::select_time('years', 'field_'.$this->field->id.'_year', $content);
+
+        $dayselector = html_writer::select_time(
+            type: 'days',
+            name: "field_{$this->field->id}_day",
+            currenttime: $content,
+            timezone: 0,
+        );
+        $monthselector = html_writer::select_time(
+            type: 'months',
+            name: "field_{$this->field->id}_month",
+            currenttime: $content,
+            timezone: 0,
+        );
+        $yearselector = html_writer::select_time(
+            type: 'years',
+            name: "field_{$this->field->id}_year",
+            currenttime: $content,
+            timezone: 0,
+        );
+
         $str .= $dayselector . $monthselector . $yearselector;
         $str .= '</div>';