In America, groundhog day is a yearly, if a bit unusual, tradition.
On the same day people ask a groundhog (it's a bit like a large squirrel) to predict when winter will end and spring will arrive.
When they lift the groundhog from its burrow and if it casts a shadow it means winter will stay for another six weeks.
Bit weird, hey? Well this year - one groundhog in Wisconsin was a little grumpy when the town's mayor asked for his prediction. Thankfully the mayor wasn't badly hurt.