Here in the U.S., we celebrated Thanksgiving last week. The modern traditional celebration involves eating way too much, awkward time spent with family members, and usually some sort of traditional recreation like watching football or a parade. As a kid, I was told the holiday was to celebrate the generosity the Native Americans showed to struggling colonists; in recent years, however, the origin of the holiday has been reported to be much darker.
But, if you look at the name of the holiday, "Thanksgiving", the core of what I celebrate is: giving thanks.
As a warning: this post is going to be a tiny bit more meta than usual. There's some game design value here, but I thought taking a look at holidays and the meanings behind them might be interesting.