User blog comment:SupcommMonroee/Suppy Super Post 4 - The Old One Was Deleted So Let's Recycle/@comment-3155949-20130207004950

It might be better to make a year conversion table. Since the ATGW measurement started in 483 BC, how would one convert between AD and ATGW? I can't into mathematical reasoning. Going from AD to ATGW would necessitate adding 483 years, and from ATGW to AD would require subtracting 483, right?