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The Persian calendar begins each year at the northward equinox, observationally determined at Tehran. [15] The Indian national calendar starts the year on the day next to the vernal equinox on 22 March (21 March in leap years) with a 30-day month (31 days in leap years), then has 5 months of 31 days followed by 6 months of 30 days. [15]
On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September. [a] More precisely, an equinox is traditionally defined as the time when the plane of Earth's equator passes through the geometric center of the Sun's disk.
On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September. More precisely, an equinox is traditionally defined as the time when the plane of Earth's equator passes through the geometric center of the Sun's disk.
The equinox arrives on Saturday, marking the start of the fall season for the Northern Hemisphere. ... That’s because on the equinox, day and night last almost the same amount of time — though ...
The Farmer's Almanac states the word equinox "comes from the Latin words for 'equal night' — aequus (equal) and nox (night). On the equinox, the length of day and night is nearly equal in all ...
This week marks the arrival of the autumn equinox and begins the start of the astronomical fall season in the Northern Hemisphere.
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Fall equinox 2024 arrives on Sunday, September 22. Find out why the first day of autumn still features a little more daylight than darkness.