S: (n) Gregorian calendar (gregorian_calendar%1:28:00::), New Style calendar (new_style_calendar%1:28:00::) (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)