Gregorian calendar

noun

: a calendar in general use introduced in 1582 by Pope Gregory XIII as a revision of the Julian calendar, adopted in Great Britain and the American colonies in 1752, marked by the suppression of 10 days or after 1700 11 days, and having leap years in every year divisible by four with the restriction that centesimal years are leap years only when divisible by 400 see Months of the Principal Calendars Table

Examples of Gregorian calendar in a Sentence

Recent Examples on the Web

Much like the Christian and Catholic observances of the Lent season leading up to Easter, Ramadan’s date on the Gregorian calendar changes each year, since it’s based on the lunar calendar. —Lianna Norman, Florida Times-Union, 5 Feb. 2026

The holiday is traditionally observed on the first two days of the Hebrew month of Tishrei, so dates on a Gregorian calendar differ slightly each year. —Alexis Simmerman, Austin American Statesman, 2 Feb. 2026

Before the adoption of the Gregorian calendar about 1,000 years ago, when the date of the equinox drifted in the Julian calendar, the spring equinox fell on March 16. —Jordan Green, Memphis Commercial Appeal, 1 Feb. 2026

Three episodes have aired at this point in the Gregorian calendar. —Kase Wickman, Vanity Fair, 23 Jan. 2026

Word History

First Known Use

circa 1771, in the meaning defined above

Rhymes for Gregorian calendar

• calender
• kalendar

Kids Definition

Gregorian calendar

noun

Gre·​go·​ri·​an calendar

gri-ˌgōr-ē-ən-, 

-ˌgȯr-

: a calendar introduced by Pope Gregory XIII in 1582 and adopted in Great Britain and the American colonies in 1752 compare julian calendar