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<?php $date = new \DateTime(); var_dump($date->modify('first day of month'), $date->modify('last day of month'));
Output for git.master, git.master_jit
Warning: DateTime::modify(): Failed to parse time string (first day of month) at position 13 (m): The timezone could not be found in the database in /in/I7MK6 on line 4 Warning: DateTime::modify(): Failed to parse time string (last day of month) at position 12 (m): The timezone could not be found in the database in /in/I7MK6 on line 4 bool(false) bool(false)
Output for rfc.property-hooks
Fatal error: Uncaught DateMalformedStringException: DateTime::modify(): Failed to parse time string (first day of month) at position 13 (m): The timezone could not be found in the database in /in/I7MK6:4 Stack trace: #0 /in/I7MK6(4): DateTime->modify('first day of mo...') #1 {main} thrown in /in/I7MK6 on line 4
Process exited with code 255.

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