Thanks all. I just used the native Month, Day, and Year in ISY that Bumbershoot referenced. Didnt know they were there.
It doesnt solve the knowing when the holidays are for those that fall on different dates each year. Ill just have to manually program them each year. Im using this to send birthday, holiday type text info to my Elk panel displays on those days. I also plan to use them to control LED stair lighting changing the color of the lights based on the holiday.
My next foray, not related to date, is adding motorized blinds to my ISY. Home automation is like crack (not that I have used it). Always looking for something else to automate...