How were years measured before the advent of BC/AD BCE/CE metrics were are familiar with today? | AskHistorians Archive Observer

How were years measured before the advent of BC/AD BCE/CE metrics were are familiar with today?

by Iddontevenknow

How would a Roman layperson refer to -30 BC? Did they have another metric they measured from?

Holy_Shit_HeckHounds

From the FAQ

BC / AD - what did they use at the time? by a deleted user

u/400-Rabbits discusses Mesoamerican year reckonings here

More discussion of the ancient Greeks How did the ancient greeks write the date? And how did they refer to past dates? by a deleted user.