From 1920 census, but father's place of birth does not fit Thomas F Day.
Father's Birthplace: Kentucky
Mother's Birthplace: Oregon
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Oregon, Death Index
Name: Harley Day
Event Date: 02 Oct 1988
Event Place: Multnomah, Oregon
Birth Date: 25 Mar 1903
Certificate Number: 88-18879
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USA Census, 1930
Name: Harley C Day
Event Place: Mount Zion, Multnomah, Oregon
Gender: Male
Age: 27
Marital Status: Single
Race: White
Relationship to Head of Household: Half-brother
Birth Year (Estimated): 1903
Birthplace: Oregon
Father's Birthplace: Iowa
Mother's Birthplace: Illinois
Household Role Gender Age Birthplace
Walter P Chatfield Head M 47 Washington
Effie B Chatfield Wife F 43 Oregon
Walter H Chatfield Son M 11 Oregon
Robert F Chatfield Son M 10 Oregon
Raymond W Chatfield Son M 8 Oregon
Claude L Peachey Stepson M 6 Oregon
Harley C Day Half-brother M 27 Oregon
Aubrey L Wise Brother-in-law M 25 Oregon
Andrey L Wise Brother-in-law M 19 California
Patricia R Wise Niece F 0 California
District: 0257 , Sheet Number and Letter: 2A , Household ID: 47 , Line Number: 42 , GS Film number: 2341689 , Digital Folder Number: 004547517 , Image Number: 00590