Dear Ms. Sandoval,
Thank you for posting your request on History Hub!
The United States Census Bureau has a history page on their website that provides very detailed information about past census practices. The Overview section gives the date of each of the decennial censuses, information about the authorizing legislation, and when applicable notes any difference from the day of the year in which the previous census was scheduled. The Index of Questions lists the questions asked on each census.
We hope this information is helpful.