Temperatures hit 90 this week in time for spring in Phoenix. Wait, it's not spring yet, is it? It is if you're a scientist. March 1 marks the beginning of the season, at least according to ...

COLUMBIA, S.C. — The first day of Spring is Thursday. Temperatures are getting warmer, the grass is starting to get greener, trees are begining to sprout new buds and leaves. Wait a minute, hasn't ...

Meteorologists and other scientists mark the change in seasons using calendar days, rather than the movement of the sun. Measuring seasons by precise dates allows scientists to more accurately track ...