Yesterday was the spring equinox (in the northern hemisphere anyway, in the southern hemisphere it's autumn). That means that the sun was directly above the earth's equator so the day and night were of equal length (although because the sun is quite a big disc rather than a mathematical point, in fact the day was about 14 minutes longer).
But you don't visit Bean-Sprouts for an astrophysics lecture. The important point is that from now on, we get more light than darkness, the ground should start warming up and the plants should start growing. Winter is past and the growing season is here.