Groundhog Day – a cherished annual celebration with no real meaning other than the fact that it is done every year. Kind of like Election Day.
The ostensible reason for Groundhog Day is meteorological – predicting the weather by dragging a hibernating rodent from its den and observing if its shadow is visible or not. Anyone could predict the outcome of that by looking up instead of down – Sunny = Shadow. Cloudy = No Shadow.