Longman Dictionary of Contemporary English homepage

Topic: CHRONOLOGY

Date: 1600-1700
Origin: Because it was introduced by Pope Gregory XIII

Gregorian calendar

 noun
     
Gre‧go‧ri‧an cal‧en‧dar [singular]
TMC the system of arranging the 365 days of the year in months and giving numbers to the years from the birth of Christ, used in the West since 1582
Definition of Gregorian calendar from the Longman Dictionary of Contemporary English within
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