Thanks, Marianne, for asking about Groundhog Day. It is one of my favorite films. Bill Murray's talents as a comedic actor shine in this film about a television weatherman mysteriously fated to relive the same day over and over again (not unlike many of us trapped in boring, mundane jobs).
After first wallowing in depression and self-pity, Bill's character comes to a realization: every day is an opportunity to learn something new, to be of service to others, and for happiness. Small efforts taken each day to learn ice sculpting for example, or how to play the piano, result in a tomorrow when practice pays off in expertise.
Also starring Andie McDowell, Groundhog Day is a very funny film with a message, one I watch again and again.