December 21 is the 355th day of the year in the Gregorian calendar. In the Northern Hemisphere, December 21 is sometimes regarded as the first day of winter. In Southern Hemisphere, it is often the longest day and occurs during the southern summer.
About December 21 in brief
December 21 is the 355th day of the year in the Gregorian calendar. In the Northern Hemisphere, December 21 is sometimes regarded as the first day of winter. In Southern Hemisphere, it is often the longest day and occurs during the southern summer.
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This page is based on the article December 21 published in Wikipedia (as of Dec. 24, 2020) and was automatically summarized using artificial intelligence.
