First Friday test

// false - not a Friday:
asdf_check_first_friday('5 November 2013', '2013', '11');

// true - first Friday:
asdf_check_first_friday('8 November 2013', '2013', '11');

// false - Friday, but not the first Friday
asdf_check_first_friday('15 November 2013', '2013', '11');