01 January 2023

Why Do Some Countries Use Different Calendars? - A New Year Post

The Julian Calendar was only ten days behind when Pope Gregory introduced his reforms. It is now thirteen days behind. The Byzantine Calendar is still used by Slavic Orthodox & Eastern Catholics for religious purposes. Many Orthodox still use the Julian Calendar, but they all begin their Church year on 1 September, the date of the world's creation. This year is AM (Anno Mundi=Year of the World) 7531.


In this video I talk about the different calendars that exist throughout the world. I explain how, in general, calendars are categorized as either being Solar, Lunar, or Lunisolar; with the first being related to the position of the sun, the second related to the position of the moon, and the third related to both. I list some of the more well known calendars in each of these categories - such as the Chinese calendar, the Hebrew, the Islamic, or the Indian National Calendar - explaining in which circumstances they are used and understanding how most of the world, save a few exceptions, has adopted the Gregorian Calendar as its main civil calendar, using local ones for cultural and religious purposes only. TIMESTAMPS: 00:00 Intro 01:40 The Different Types of Calendars (Solar, Lunar, Lunisolar) 03:13 Features of Lunar Calendars 04:01 The Global Adoption of the Gregorian Calendar 04:57 Historical Examples of Solar Calendars 06:01 Current Solar Calendars 06:46 Ethiopian Calendar 07:41 Current Lunar Calendars 07:44 Islamic Calendar 08:26 Chinese Calendar 09:43 Other Civil Calendars other than the Gregorian 10:10 Indian National Calendar 10:45 Hebrew Calendar 12:31 Summary

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