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|Noun||1.||ecclesiastical calendar - a calendar of the Christian year indicating the dates of fasts and festivals|
Gregorian calendar, New Style calendar - the solar calendar now in general use, introduced by Gregory XIII in 1582 to correct an error in the Julian calendar by suppressing 10 days, making Oct 5 be called Oct 15, and providing that only centenary years divisible by 400 should be leap years; it was adopted by Great Britain and the American colonies in 1752
Advent - the season including the four Sundays preceding Christmas
Shrovetide - immediately preceding Lent