22 September

September 22 is the 265th day of the year (266th in leap years) in the Gregorian calendar. There are 100 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Thursday or Saturday (58 in 400 years each) than on Sunday or Monday (57), and slightly less likely to occur on a Wednesday or Friday (56). It is frequently the day of the autumnal equinox in the Northern Hemisphere and the day of the vernal equinox in the Southern Hemisphere.

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Wikipedia