Today, March 20, is the first day of spring in the Northern Hemisphere and the first day of autumn in the Southern Hemisphere. The March Equinox, as today is most properly named, began at 04:48 UTC (12:48 a.m. Eastern Daylight Time). Today, everywhere on planet earth, the day and night are exactly twelve hours long - sunrise is at 6 a.m. and sunset is at 6 p.m. (disregarding time zone changes). At the North Pole, it will remain daylight until the September Equinox and at the South Pole, it will remain dark until the September Equinox. The sun is directly overhead the equator at noon today.
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that is so wonderful,are you a scientist
Matt, I have to tell you that today’s March Equinox was at 05:48 UTC (not 04:48).
And: It is not true that today “everywhere on planet earth, the day and night are exactly twelve hours long”. For example:
New York: sunrise: 6h58.6 (EST), sunset: 19h08.5 -> length of day = 12h09.9m
Or here in Vienna (Austria): sunrise: 5h57.1 (CET), sunset: 18h07.7, length of day = 12h10.6m.
But we had a perfect 12h-day on 17 March (sunrise: 6h03.2, sunset: 18h03.2, length of day = exactly 12 hours).
You can find all about equinoxes at This Webpage
Regards
Martin