The most widely used calendar, known as the Gregorian calendar, started dating the 1st year based on what event?

Question

A the birth of Jesus Christthe birth of Jesus Christ
B the birth of Julius Caesarthe birth of Julius Caesar
C the start of the Jewish religionthe start of the Jewish religion
D the beginning of the Roman empire

Answer 1

A) the birth of Jesus Christ.

The Gregorian calendar, introduced by Pope Gregory XIII in 1582, is based on the estimated year of the birth of Jesus Christ, marking the 1st year AD (Anno Domini).