+<?php
+$current_offset = get_option('gmt_offset');
+$tzstring = get_option('timezone_string');
+
+$check_zone_info = true;
+
+// Remove old Etc mappings. Fallback to gmt_offset.
+if ( false !== strpos($tzstring,'Etc/GMT') )
+ $tzstring = '';
+
+if ( empty($tzstring) ) { // Create a UTC+- zone if no timezone string exists
+ $check_zone_info = false;
+ if ( 0 == $current_offset )
+ $tzstring = 'UTC+0';
+ elseif ($current_offset < 0)
+ $tzstring = 'UTC' . $current_offset;
+ else
+ $tzstring = 'UTC+' . $current_offset;
+}
+
+?>
+<th scope="row"><label for="timezone_string"><?php _e('Timezone') ?></label></th>
+<td>
+
+<select id="timezone_string" name="timezone_string">
+<?php echo wp_timezone_choice($tzstring); ?>
+</select>
+
+ <span id="utc-time"><?php printf(__('<abbr title="Coordinated Universal Time">UTC</abbr> time is <code>%s</code>'), date_i18n($timezone_format, false, 'gmt')); ?></span>
+<?php if ( get_option('timezone_string') || !empty($current_offset) ) : ?>
+ <span id="local-time"><?php printf(__('Local time is <code>%1$s</code>'), date_i18n($timezone_format)); ?></span>
+<?php endif; ?>
+<p class="description"><?php _e('Choose a city in the same timezone as you.'); ?></p>
+<?php if ($check_zone_info && $tzstring) : ?>
+<br />
+<span>
+ <?php
+ // Set TZ so localtime works.
+ date_default_timezone_set($tzstring);
+ $now = localtime(time(), true);
+ if ( $now['tm_isdst'] )
+ _e('This timezone is currently in daylight saving time.');
+ else
+ _e('This timezone is currently in standard time.');
+ ?>
+ <br />
+ <?php
+ $allowed_zones = timezone_identifiers_list();
+
+ 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 ) {
+ echo ' ';
+ $message = $tr['isdst'] ?
+ __('Daylight saving time begins on: <code>%s</code>.') :
+ __('Standard time begins on: <code>%s</code>.');
+ // Add the difference between the current offset and the new offset to ts to get the correct transition time from date_i18n().
+ printf( $message, date_i18n(get_option('date_format') . ' ' . get_option('time_format'), $tr['ts'] + ($tz_offset - $tr['offset']) ) );
+ } else {
+ _e('This timezone does not observe daylight saving time.');
+ }
+ }
+ // Set back to UTC.
+ date_default_timezone_set('UTC');
+ ?>
+ </span>
+<?php endif; ?>
+</td>
+