Goundhog Day

Groundhog day happens the same day every year.  One of two things always happens, he comes out of the hole, or stays in. Since so many stories have been written about this, relatively uneventful occurrence, but not many people are aware of its beginnings it could be something interesting to a reader.  Instead of just giving the short story about how it was originally a European 'weather lore;' explore other traditions like this that began in the 19 century.  Do we celebrate any of them anymore?  Why did Groundhog Day survive and the others did not?