Question

How do we tell dates in history

Answer 1

We tell the dates by referring to the era of B.C. (Before christ) and A.D (After death).We write them after the date and hence referring them.

Answer 2

In History, we always denote or tell the time as the era before the birth of Christ (BC) and the era after the death of Christ (AD).  

This terminology of telling dates was developed by the Roman church as at that time only Roman Church was regulating the system of regularizing dates. For example, 10 AD means 10 years “after the birth of Christ”. 10 B.C. means the time of 10 years “before the birth of Christ”. Examples: Chandragupta Maurya was born 345 BC and died 297 BC, 345 years ago, died 297 years ago, the total age of 48 years. Nowadays, we use the "Brief Common Era" (BCE or BCE) in place of Common Era (CE or CE) and BC has become normal.