I need to create a multiculture lesson plan, I was thinking that I would try and do one during the christmas season with students that celebrate christmas and those that don't also having a students of different ethnic background and the different ways that they celebrate

That's a good idea, so long as you include customs of people who do not celebrate any holidays during the last couple weeks of the year.

Consider this widely publicized (but probably facetious) so-called custom.

http://blogs.mcclatchydc.com/washington/2010/06/kagan-i-was-probably-at-a-chinese-restaurant-on-christmas.html