All my calendars list the first day of Spring as March 21, but here in northern Ohio the vernal equinox is actually March 20. The only reason I can figure out is the vernal equinox is 00:07 Greenwich on the 21th which works out to 20:07 on the 20th in Ohio. I now feel like I need to double check the dates of the seasons shown on my calendar, plus allow for the new Daylight Saving rule.
2007-03-21 11:45:59 · 2 answers · asked by pschroeter 5 in Society & Culture ➔ Holidays ➔ Other - Holidays
Most UTC days contain exactly 86400 seconds, with exactly 60 seconds in each minute. Occasionally the last minute of a day has 59 or 61 seconds. So these irregular days have 86399 seconds or 86401 seconds. The irregular day lengths mean that fractional Julian days don't work properly with UTC. The intercalary seconds are known as "leap seconds". (this paragraph / information came from the link listed below)
That being said...spring officially began in the early evening of March 20th, 2007, however March 21st, 2007 is the "first full day" of Spring. Even though spring officially began in the early evening the night before, one could not mark it as a the "first full day" of spring - to be classified as a "day" it would have to encompass 24 hours starting at the stroke of midnight.
Below is a link that should help you understand the time shift, due to the earths rotation and angle.
2007-03-21 15:24:14 · answer #1 · answered by soulful thinker 5 · 1⤊ 0⤋
All Uk calenders are the same has for me I wish they would leave the clocks alone.
2007-03-28 15:26:20 · answer #2 · answered by Ollie 7 · 0⤊ 0⤋