Astronomical winter reaches its true midpoint on Feb. 3, as daylight gains begin to accelerate across the Northern Hemisphere.
Groundhog Day isn't the halfway point of winter — the real one arrives tomorrow
Source: space
Source Link: https://www.space.com/stargazing/groundhog-day-isnt-the-halfway-point-of-winter-the-real-one-arrives-feb-3-2026