What was the reason the year 46 BC was 445 days and not 365 days? Why 90 days were added by Julius Caesar and Sosigenes of Alexandria?

Question

What was the reason the year 46 BC was 445 days and not 365 days? Why 90 days were added by Julius Caesar and Sosigenes of Alexandria?

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Answer 1

The Romans were planning to change to the Julian calendar. The original plan was for them to add a few leap months in the previous years. However, there were wars and other issues that distracted them, so they forgot to add some leap months. As result, they decided to add three months to the current year in order to compensate for the months they forgot to add, and complete the synchronisation.