Ticket #49038: 49038-settings-dst-transition-time.patch

src/wp-admin/options-general.php

@@ -276 +276 @@
         ?>
         <br />
         <?php
-        $allowed_zones = timezone_identifiers_list();
+        if ( in_array( $tzstring, timezone_identifiers_list() ) ) {
+                $transitions = timezone_transitions_get( timezone_open( $tzstring ), time() );
 
-        if ( in_array( $tzstring, $allowed_zones ) ) {
-                $found                   = false;
-                $date_time_zone_selected = new DateTimeZone( $tzstring );
-                $tz_offset               = timezone_offset_get( $date_time_zone_selected, date_create() );
-                $right_now               = time();
-                foreach ( timezone_transitions_get( $date_time_zone_selected ) as $tr ) {
-                        if ( $tr['ts'] > $right_now ) {
-                                $found = true;
-                                break;
-                        }
-                }
-
-                if ( $found ) {
+                // 0 index is state at current time, 1 index is next closest transition if any.
+                if ( ! empty( $transitions[1] ) ) {
                         echo ' ';
-                        $message = $tr['isdst'] ?
+                        $message = $transitions[1]['isdst'] ?
                                 /* translators: %s: Date and time. */
                                 __( 'Daylight saving time begins on: %s.' ) :
                                 /* translators: %s: Date and time. */
                                 __( 'Standard time begins on: %s.' );
-                        // Add the difference between the current offset and the new offset to ts to get the correct transition time from date_i18n().
                         printf(
                                 $message,
-                                '<code>' . date_i18n(
-                                        __( 'F j, Y' ) . ' ' . __( 'g:i a' ),
-                                        $tr['ts'] + ( $tz_offset - $tr['offset'] )
-                                ) . '</code>'
+                                '<code>' . wp_date( __( 'F j, Y' ) . ' ' . __( 'g:i a' ), $transitions[1]['ts'] ) . '</code>'
                         );
                 } else {
                         _e( 'This timezone does not observe daylight saving time.' );