Christmas, for example, was originally a pagan ritual appropriated by Christians; I don't see why the Christianized ritual can't then be appropriated by unbelievers. It's already been appropriated and extended by capitalists, and turned into a paroxysm of spending. Appropriate away. There's nothing hypocritical about it unless, like Christians, you pretend you didn't appropriate.

Most of the Christian ones are adaptation of other religions, that are adaptations of others....
In the end its all solstice, equinoxes, harvest festival, hunting season and this kind of stuff.

Honestly, I always look for a deeper meaning behind every holiday. I actually hate Christmas. That's not a good attitude for a minister even a New Thought one. I try to concentrate on the importance of generosity.
The true story of St, Nicholas helps. Everyone thought he was a total jerk, grumpy, violent etc. ,but after he died they discovered that he had given away a family fortune to needy families down in the village near his monastery over several years, anonymously. Christmas still sucks though.
Easter is not much better. Poor Jesus, celebrating a good mans excruciating death on a cross for over 2000 years with cute bunnies and colored eggs is kind of sick. Celebrating fertility is a much better idea, But if it were up to me, we would celebrate it in a much more adult way. I guess we can keep the bunnies and eggs for the kids. Just don't tell them what they actually symbolize
Damn, I just remembered I have to put up all that crap at the Church in less than a month. At least Jesus only suffered once.