Fatal error: Uncaught TypeError: strtotime(): Argument #2 ($baseTimestamp) must be of type ?int, string given in /in/7mXZO:2
Stack trace:
#0 /in/7mXZO(2): strtotime('+1 day', '2014-01-02')
#1 {main}
thrown in /in/7mXZO on line 2
Process exited with code 255.