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<?php $yr="2011"; $week="01"; $day="mon"; echo date("Y-m-d", strtotime($yr."W".$week."D ".$day));; echo date("D",$day); ?>
Output for git.master, git.master_jit, rfc.property-hooks
2011-01-04 Fatal error: Uncaught TypeError: date(): Argument #2 ($timestamp) must be of type ?int, string given in /in/P1g2L:6 Stack trace: #0 /in/P1g2L(6): date('D', 'mon') #1 {main} thrown in /in/P1g2L on line 6
Process exited with code 255.

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