Front

Who first established January 1 as the start of the New Year?

Back

Julius Caesar

Front

Why did the Roman Senate move the consulship start date to January 1 in 154 B.C.E.?

Back

To address an urgent rebellion in Spain

Front

What was the primary purpose of the Julian calendar reform?

Back

To accurately align with the solar year

Front

What innovation did Sosigenes contribute to the Julian calendar?

Back

Introduction of the leap year

Front

What issue did the Julian calendar fail to correct?

Back

The exact length of the solar year

Front

Why did Pope Gregory XIII reform the Julian calendar in 1582?

Back

To align with Easter’s date

Front

What change did the Gregorian calendar introduce regarding leap years to make it exactly match the solar year?

Back

Centennial years are not leap years unless divisible by 400.

Front

Which country was the last major nation to adopt the Gregorian calendar?

Back

Saudi Arabia

Front

What was a significant obstacle for Protestant countries in adopting the Gregorian calendar?

Back

Resistance to a Catholic Pope's innovation

Front

What was the original Roman calendar’s major flaw?

Back

Too few days in a year