Today is first full day of spring in the Northern Hemisphere. Did winter seem long to you? It certainly does to many people. Actually, though, it's the shortest of the four seasons. I know that might be hard to believe, but it's true. I'll prove it.
Normally, a season begins on the 20th, 21st, or 22nd of the month (March, June, September, or December), with the average being the 21st. On average then, spring runs from March 21 until June 21, for a total of 92 days (March 21 to April 21 = 31 days, April 21 to May 21 = 30 days, May 21 to June 21 = 31 days). Summer runs from June 21 until September 21, for a total of 92 days (June 21 to July 21 = 30 days, July 21 to August 21 = 31 days, August 21 to September 21 = 31 days). Fall runs from September 21 until December 21, for a total of 91 days (September 21 to October 21 = 30 days, October 21 to November 21 = 31 days, November 21 to December 21 = 30 days).
However, winter runs from December 21 until March 21, for a total of only 89 days (December 21 to January 21 = 31 days, January 21 to February 21 = 31 days, February 21 to March 21 = 28 days). Obviously, this is because February only has 28 days. Even in a leap year, when February has 29 days, winter's total number of days is only pushed to 90, one day short of the average fall, and two days short of the average spring or summer.
Now, one might intuitively think that, due to February being so short, the average spring would actually begin later in the month of March than the average summer, fall, or winter would begin in June, September, and December, respectively. After all, if February had at least 30 days, like every other month does, then what we know as the 21st of March would actually just be the 19th. So, shouldn't the average beginning of spring be on the 23rd of March, which would be the 21st of any other month? But that's not the way it works, so winter gets "short-changed."




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