Repeats every month on February, April, June, August, October, December on the fourth Saturday until Sat Dec 22 2018 except Sat Mar 24 2018, Sat May 26 2018, Sat Sep 22 2018. Also includes Sat Mar 31 2018, Sat Jun 02 2018, Sat Sep 29 2018, Sat Oct 06 2018, Sat Dec 01 2018.