Today is the March equinox, to use the globally correct term. The terms vernal or spring equinox are accurate only in reference to the northern hemisphere, whereas the equinox is a global phenomenon. According to some, this marks the beginning of spring in the northern hemisphere, but my own sense of the day has always been that it marks the midpoint of the season and that the cross quarter day (Groundhog’s Day/Candlemas/Imbolc) marks the beginning of the season. This impression has been strengthened mightily by my relocation to a slightly lower latitude, where early spring bulbs can often be found blooming before the end of February. Even this year, when we had a longer, harsher winter than of late, spring is decidedly in full swing now and well beyond the starting point.
So happy equinox day, and happy spring!