Welcome to February, and happy 139th birthday James Joyce!
Groundhog Day is a cross-quarter day, halfway from solstice to equinox. I think of the quarter days (solstices and equinoxes) as being pivot days for heat, and cross-quarter days as being pivot days for light. So it starts getting really cold in late December, but it takes a while for you to truly notice that the days are getting longer. It takes, roughly speaking, until now. Groundhog Day can be celebrated as the return of the light. It’s still cold, but from now on winter is fighting a losing battle. It’s on its back foot. You can only go halfway into a tunnel. After that, you’re going out of it. That’s where we are. Heading out of winter.
In a somewhat larger sense, we might say that we’re on our way out of a number of unpleasant ordeals. We’re still in the tunnel. But hey! Breathe a little easier. We’re on the way out. The light is returning.