I have recently had cause to ponder the lack of established atheist holidays (etymology of the word holiday notwithstanding). I feel that there must be a number of days that are acceptable cause for celebration for atheists and theists alike. While I admit that some theists would have trouble with celebrating Darwin Day I think that something like Pi day which celebrates a universal constant would be a good compromise.
I would love to hear suggestions as to what can be done to legitimise and promote atheist holidays. I also believe it would be best if this thread was used for commentary of the promotion of atheist celebrations rather than the bitter rants about Christmas I have encountered elsewhere in the forums.