Gregory's ServerTIL about years [[ab urbe condita]], or since the founding of Rome, a standard once common among historians, in particular in the middle ages and Renaissance.
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You add 753 to the Common Era year. This has the nice side effect that even numbered CE years have a chance of being prime in AUC. Indeed this is the case for 2024 CE: 2777 AUC is prime.  @flancian Interesting! And today I also learned the term regnal years. When I lived in Japan, I had to get used to identifying my birth year as Showa 30, the 30th year of the reign of the Showa emperor... |
@flancian
https://anagora.org/ab+urbe+condita