September Equinox

September Equinox

The September 23rd Equinox, otherwise called the September occurs at 12:50AM PM, or at 07:50 UTC, which is when Sun will shine directly on the equator and there will be nearly equal amounts of day and night throughout the world.

The September Equinox represents the first day of fall, autumnal equinox, in the Northern Hemisphere and the first day of spring, vernal equinox, in the Southern Hemisphere.

The date of this equinox is either directly on or about September 22, while the first equinox of the year, the March Equinox, takes place on or about March 21 every year.

The full Moon closest to the September equinox, the Harvest Moon, is astronomically special because the time between moonrises on consecutive days becomes shorter. This can be seen as on average, the Moon rises about 50 minutes later every day in a lunar month – the time period between two Full Moons or two New Moons. Around the Harvest Moon, the time difference between two successive moonrises decreases to less than 50 minutes for a few days.

Known as the Harvest Moon Effect, this phenomenon occurs due to the low angle the Moon’s orbit around Earth makes with the horizon during this time of year. In the days past, the early moonrise for a few days around the equinox in the Northern Hemisphere meant that farmers could work and harvest their crops for a longer time in the evenings.

References And Further Reading

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