Dating in aa

24-Jul-2017 22:39

Therefore, the 21st century began with 1 January 2001 and will continue through 31 December 2100.

dating in aa-52

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Frequently, years were counted from the ascension of a ruler.

But since the concept of negative numbers did not come into use in Europe until the 16th century, and was initially only of interest to mathematicians, its application to chronological problems was delayed for two more centuries.