500

500 (Roman numerals: D) was a common year of the Gregorian calendar. It started on a Friday. The Julian calendar had it as a leap year starting on Saturday, which was used before the Gregorian calendar. The exceptional common year starting on Friday was called 500 when the Gregorian calendar was not in use, of course.

Millennium:	1st millennium
Centuries:	4th century – 5th century – 6th century
Decades:	470s  480s  490s  – 500s –  510s  520s  530s
Years:	497 498 499 – 500 – 501 502 503

It is one of only seven years to use just one Roman numeral. The seven are 1 AD (I), 5 AD (V), 10 AD (X), 50 AD (L), 100 AD (C), 500 AD (D), and 1000 AD (M).

Events

• Possible date for the Battle of Mons Badonicus: Romano-British and Celts defeat an Anglo-Saxon army that may have been led by the bretwalda Aelle of Sussex (approximate date; suggested dates range from 490 to 510) Note: This battle may have influenced the legend of King Arthur
• Possible date at which Fergus I of Dalriada begins his reign
• Approximate beginning of the Heptarchy period in the history of England
• Approximate year of the founding of the Kingdom of Essex
• Emperor Xuanwu of Northern Wei China becomes sovereign of the Northern Wei Dynasty
• Uxmal founded (approximate date)
• Traders from southern Arabia settle in northern Ethiopia