Happy Groundhog Day
Groundhog Day or Groundhog's Day is a traditional festival celebrated in the United States and Canada on February 2. It is a cross-quarter day, midway between the Winter Solstice and the Vernal Equinox.
In traditional weather lore, if a groundhog emerges from its burrow on this day and fails to see its shadow because the weather is cloudy, winter will soon end. If the groundhog sees its shadow because the weather is bright and clear, it will be frightened and run back into its hole, and the winter will continue for six more weeks.
The above is attributable to Wikipedia and you can check it out further at http://www.groundhog.org/ to see Phil in action.