HOMEWORK HELP on kwanzaa, christmas, and hanukkah?

okk so i have to write an essay on how kwanzaa, christmas, and hanukkah are alike but different in some way. An example would be they all are in december but not on the same days...only im not allowed to use that example on the essay...i really need help with this...oh and btw im talking about the american version of kwanzaa. Thankkk yooooouu!!=]