Geologic Calendar (Geology ⛰️)

The Geologic Calendar is a scale in which the geological timespan of the Earth is mapped onto a calendrical year; that is to say, the day one of the Earth took place on a geologic January 1 at precisely midnight, and today's date and time is December 31 at midnight. On this calendar, the inferred appearance of the first living sing...

https://en.wikipedia.org/wiki/Geologic_Calendar

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