--TEST-- Test for bug #74652: Incomplete dates --INI-- date.timezone=UTC --FILE-- <?php $formats = [ '2017-03-25 10:52:09', '2017-03-25 10:52', '2017-03-25 10am', '2017-03-25', '2017-03', '2017.042', '2017043', ]; foreach ( $formats as $format ) { $dt = new DateTimeImmutable( $format ); echo $dt->format( 'Y-m-d H:i:s' ), "\n"; } ?> --EXPECT-- 2017-03-25 10:52:09 2017-03-25 10:52:00 2017-03-25 10:00:00 2017-03-25 00:00:00 2017-03-01 00:00:00 2017-02-11 00:00:00 2017-02-12 00:00:00