The reason why Christmas is a national holiday, whether you celebrate it or not, is because it symbolically represents the season of giving. Many of the other religious holidays in December including Hanukkah and Kwanzaa are the same way.
Personally, I’m a giver. It’s more fun for me to figure out unique ways to bless someone with a gift than it is to think about what I’m going to receive from other people. Don’t get me wrong. I still act like a little kid on Christmas morning when my wife gets me the gadget I’ve been salivating over the entire year. But, I really enjoy giving to others. It’s a huge motivator and it helps puts life into perspective for me.