When did the Julian calendar start?

The Julian calendar was introduced in ancient Rome at the direction of Julius Caesar. It began its action on January 1, 45 BC. The reckoning of time itself was developed by a group of Alexandrian astronomers. The capital of Egypt at that time possessed the largest library and was one of the world’s centers of science. The Julian year was divided by 365.25 days, 11 minutes behind the Earth year on average.



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