Julian Period

A calendar era is the year numbering system used by a calendar. For example, the Gregorian calendar numbers its years in the Western Christian era (the Coptic and Ethiopic churches have their own Christian eras, see below). The instant, date, or year from which time is marked is called the epoch of the era. There are many different calendar eras. Some are listed below along with their abbreviations (if any). A.D. (or AD) — for the Latin Anno Domini, meaning in the year of our Lord. Yea ...

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(6th millennium BC – 5th millennium BC – 4th millennium BC – other millennia) 5th millennium BC - Events. 4860 BC - Mount Mazama in Oregon collapses, forming a caldera that later fills with water and becomes Crater Lake, the deepest lake in the United States. 4713 BC – The epoch (origin) of the Julian Period described by Joseph Justus Scaliger occurred on January 1, the astronomical Julian day number zero. 4004 BC – The universe is created at nightfall preceding Oct ...

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• 5th millennium BC - Events
• 5th millennium BC - Cultures
• 5th millennium BC - Periods
• 5th millennium BC - Inventions discoveries introductions
• 5th millennium BC - Fictional events

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