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<!DOCTYPE html> <html> <body> <?php $date=date_create("2013-05-25",timezone_open("Indian/Kerguelen")); echo date_format($date,"Y-m-d H:i:sP") . "<br>"; date_timezone_set($date,timezone_open("Europe/Paris")); echo date_format($date,"Y-m-d H:i:sP"); ?> </body> </html>