mcal_day_of_week

Returns the day of the week of the given date (PHP 3 >= 3.0.13, PHP 4, PECL)
int mcal_day_of_week ( int year, int month, int day )

mcal_day_of_week() returns the day of the week of the given date. Possible return values range from 0 for Sunday through 6 for Saturday.