March 20

March 20 is the 79th day of the year (80th in leap years) in the Gregorian calendar. There are 286 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Friday or Sunday (58 in 400 years each) than on Wednesday or Thursday (57), and slightly less likely to occur on a Monday or Saturday (56). Typically the March equinox falls on this date, marking the vernal point in the Northern Hemisphere and the autumnal point in the Southern Hemisphere, when both day and night are of equal length.

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Wikipedia