Do other cultures have a holiday or tradition as silly as Groundhog Day?

Check out “First footing” and “Loony dook” in this link for some Scottish silliness on Hogmanay

https://www.anglia-translations.co.uk/a-complete-guide-to-hogmanay-traditions/

There’s also the Padstow ‘obby ‘Orse festival held in Cornwall in May.

https://en.wikipedia.org/wiki/%27Obby_%27Oss_festival

Once a year a small county in Spain tosses lots of tomatoes at each other.

In Germany, on father’s day, men form in groups, take a small wagon, fill it with bottles of beer, and then go wandering around for the day, getting shitfaced along the way.
Because nothing says “fatherhood” like abandoning the family and indulging in excessive alcohol consumption.

Wow, dads get Father’s Day and Octoberfest in Germany!