2006-11-20 10:13:49 · 7 answers · asked by dynamiccharge 2 in Science & Mathematics ➔ Other - Science
There is no day of the year that has EXACTLY 12 hours of daylight and 12 hours of dark because no day is EXACTLY 24 hours long. A sidereal day is 23 hours, 56 minutes, 4.091 seconds long. On the equinoxes, we have approximately equal amounts of light and dark.
2006-11-23 09:11:11 · answer #1 · answered by gone 7 · 0⤊ 0⤋
When the sun is at autumnal equinox, which is when the sun is sitting on the Earth's equator. This happens twice a year and everyone gets 12 hours of daylight and 12 hours of dark.
2006-11-20 19:18:36 · answer #2 · answered by izzyhearts 1 · 0⤊ 0⤋
The Vernal Equinox.
2006-11-20 18:17:52 · answer #3 · answered by bartman40467 4 · 0⤊ 0⤋
At the Autumnal and Vernal Equinoxes (or whatever equinox is plural).
2006-11-20 18:16:38 · answer #4 · answered by merviedz trespassers 3 · 0⤊ 0⤋
Spring and autumn equinoxes - approx 21st March and 21st September.
2006-11-20 18:56:39 · answer #5 · answered by rosie recipe 7 · 0⤊ 0⤋
The spring and autumn equinox, or on the equator.
2006-11-20 18:16:59 · answer #6 · answered by Anonymous · 0⤊ 0⤋
It's calle d"Equinox", see here:
2006-11-20 18:18:47 · answer #7 · answered by Robert K 6 · 0⤊ 0⤋