Constitutionality of National Day of Prayer?

After reading countless posts about the 'National day of Prayer' being removed by Obama, I felt inclined to do a little research.

You can read the entire entry on Snopes:

President Obama has decided that there will no longer be a "National Day of Prayer" held in May. He doesn't want to offend anyone. Where was his concern about offending Christians last January when he allowed the Muslims to hold a day of prayer on capitol grounds. As an American Christian "I am offended." if you agree, copy and paste no matter what religion you are. This country was built on freedom!!

http://www.snopes.com/politics/obama/prayerday.asp

Which brings us to the next location of this argument, the constitutionality of this actual law.





What do you think?