From Rootsweb Review, Vol. 6, No. 22, 28 May 2003
Editor's Note: U.S. enumerators were instructed to take down
the names
of the family as it was composed on the OFFICIAL DATE of the census --
not the day of the actual visit. Official census dates were:
First Monday in August for 1790-1820 schedules
June 1 for 1830-1880
First Monday in June for 1890
(most of this schedule was destroyed or badly damaged by a fire in 1921
June 1 for 1900
April 15 for 1910
January 1 for 1920
April 1 for 1930
See "U.S. Census Records: Soundexes, Indexes and Finding Aids"
http://rwguide.rootsweb.com/lesson9.htm