// mktime(hour, minute, second, month, day, year, is_dst);
echo date("M-d-Y", mktime(0, 0, 0, 12, 32, 2016)) . "<br />";
echo date("M-d-Y", mktime(0, 0, 0, 13, 1, 2016)) . "<br />";
echo date("M-d-Y", mktime(0, 0, 0, 1, 1, 2016)) . "<br />";
echo date("M-d-Y", mktime(0, 0, 0, 1, 1, 16)) . "<br />";
/*
run:
Jan-01-2017
Jan-01-2017
Jan-01-2016
Jan-01-2016
*/