+ const HTTP = 'D, d M Y H:i:s \G\M\T';
+ const JSON = 'Y-m-d\TH:i:s.v\Z';
+ const API = 'D M d H:i:s +0000 Y';
+
+ static $localTimezone = 'UTC';
+
+ public static function setLocalTimeZone(string $timezone)
+ {
+ self::$localTimezone = $timezone;
+ }