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Roman calendar

3:55

A Short History of the Modern Calendar

2:29

Gregorian calendar and Julian calendar - what's the difference?

3:22

The Jewish Calendar, Explained

1:51

Teach Astronomy - Early Roman Calendar

2:26

Homeschool History - the Roman Calendar

The Roman calendar was the calendar used by the Roman kingdom and republic. It is often inclusive of the Julian calendar established by the reforms of the dictator Julius Caesar and emperor Augustus in the late 1st century BC and sometimes inclusive of any system dated by inclusive counting towards months' kalends, nones, and ides in the Roman manner. It is usually exclusive of the Alexandrian calendar of Roman Egypt, which continued the unique months of that land's former calendar; the Byzantine calendar of the later Roman Empire, which usually dated the Roman months in the simple count of the ancient Greek calendars; and the Gregorian calendar, which refined the Julian system to bring it into still closer alignment with the solar year and is the basis of the current international standard.
    • History 

    • Days 

    • Weeks 

    • Months 

    • Intercalation 

    • Years 

    • Conversion to Julian or Gregorian dates