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

Michaelmas, Michaelmas Day, September 29 - honoring the archangel Michael; a quarter day in England, Wales, and Ireland

Labor Day - first Monday in September in U.S. and Canada

Citizenship Day, September 17 - celebrated in the United States

American Indian Day - US: the 4th Friday in September

Gregorian calendar month - a month in the Gregorian calendar

mid-September - the middle part of September

autumnal equinox, fall equinox, September equinox - September 22

autumn, fall - the season when the leaves fall from the trees; "in the fall of 1973"

people - members of a family line; "his people have been farmers for generations"; "are your people still alive?"

homefolk - the people of your home locality (especially your own family); "he wrote his homefolk every day"

house - aristocratic family line; "the House of York"

dynasty - a sequence of powerful leaders in the same family

gens, name - family based on male descent; "he had no sons and there was no one to carry on his name"

blood line, bloodline, ancestry, lineage, pedigree, stemma, line of descent, blood, parentage, origin, descent, stock, line - the descendants of one individual; "his entire lineage has been warriors"