Late to discover Groundhog Day

How did I live to be 50 before I watched this classic movie?  Bill Murray plays a sunovabitch who because of a glitch in time learns to be a decent human.  The glitch: every day is the same day, Groundhog day.  He is a TV weather man who is accumstomed to being rude, selfish, and sarcastic to everyone.  He discovers along the way that one of the people he gets to relive this day with is a truly wonderful woman, and it takes him a long time to become a man worthy of her.  People told me it was a great movie but for some reason the groundhog part turned me off.  Funny, maybe I'm learning.