Yes, the calendar is just a system for counting days, which has nothing much to do with the natural world, but it’s a system we’ve used for a long time. That gives us an excuse to celebrate the way the numbers line up on certain dates. Today is special because it’s Groundhog Day, Super Bowl Sunday, and also a pure palindrome when you write the numbers out, no matter which side of the pond you are on. There are other strange and rare things about this day which standupmaths will explain. However you decide to celebrate it, have a great day!