Online PHP editor | refs for Drfk6

<?php $TZ= timezone_open( "UTC" ); $refdate=date_create_from_format ( "z Y" ,"31 2020" ,$TZ ); echo date_format($refdate,"d/m/Y"), PHP_EOL; $refdate=date_create_from_format ( "z Y" ,"60 2020" ,$TZ ); echo date_format($refdate,"d/m/Y"), PHP_EOL; $refdate=date_create_from_format ( "z Y" ,"91 2020" ,$TZ ); echo date_format($refdate,"d/m/Y"), PHP_EOL; $refdate=date_create_from_format ( "z Y" ,"121 2020" ,$TZ ); echo date_format($refdate,"d/m/Y"), PHP_EOL; $refdate=date_create_from_format ( "z Y" ,"130 2020" ,$TZ ); echo date_format($refdate,"d/m/Y"), PHP_EOL;