World football's governing body had previously announced the date of the final but the start date of November 21 means the tournament will be just 28 days in duration -- the shortest since the competition switched to a 32-team tournament in 1998.
The 2014 World Cup in Brazil was held over 32 days while the shortest 32-team tournament had been 31 days.
The Qatar tournament will mark the first time that the event is held during Europe's winter months - previously the competition had been held in June and July.
(Reporting By Simon Evans; Editing by Angus MacSwan)
