Dear Ms. Garrett,
Thank you for posting your request on History Hub!
We suggest that you review NARA’s Resources for Genealogists, as well as the History Hub Blog titled Suggestions and Advice for Family History Researchers. Also, the FamilySearch Research wiki for United States Genealogy may be useful.
One specific resource at the National Archives in assisting researchers with their genealogical research is the United States Census. The National Archives has the census available on microfilm (as well as digitized by our partners) from 1790 to 1940. Census schedules from the early 20th Century often included information about an individual’s location of birth, so you may be able to determine that from the census. We have included entries from the National Archives Catalog for the census schedules that your father would have been alive that may include information you would find valuable.
From the National Archives Catalog and located the Population Schedules for the 1900 Census, the Population Schedules for the 1910 Census, the Population Schedules for the 1920 Census, the Population Schedules for the 1930 Census, and the Population Schedules for the 1940 Census in the Records of the Bureau of the Census (Record Group 29) that may contain information about John Divine Day in the state in which he resided. The 1940 Census schedules are digitized and available using the Catalog. For more information about the non-digitized schedules, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at email@example.com.
Due to the continued impact of COVID-19, you may experience a delay in receiving an initial acknowledgment as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience as we balance mission-critical work and the safety of our staff during the pandemic. Please check NARA’s web page about COVID-19 updates for the latest information.
You may wish to search Ancestry or FamilySearch for the U.S. Census. There may be a fee for using Ancestry. Instead, please check for access at your local library as many library systems subscribe to these sites, making them free for their patrons.
We hope this is helpful. Best of luck with your family research!