I found my answer Thank you.
1. Aug 19, 2009 9:41 AM in response to: Carl Harbeck
No they're not and for good reason. There are very few holidays that occur on the exactly the same date every year. What about Christmas, I hear you say! Well, what happens if it occurs on the weekend? Are there extra days of holiday that are taken instead?
You need to maintain the holidays as an ongoing activity, making sure that you are always as far ahead as your longest SLA. In other words, don't do the dates for 2010 and then wait until the end to do 2011.