- 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
--1 is a kind of solar calendar
--1 has parts:
--1 has particulars: church calendar, ecclesiastical calendarGregorian calendar month; January, Jan; February, Feb; March, Mar; April, Apr; May; June; July; August, Aug; September, Sep, Sept; October, Oct; November, Nov; December, Dec