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Founded by Charles Peter Weeks and William Peyton Day in 1916.1
Private company
Former American architectural firm
Weeks and Day was an American architectural firm founded in 1916 by architect Charles Peter Weeks (1870–1928) and engineer William Peyton Day (1886–1966). The firm worked throughout California but mainly in the San Francisco Bay Area, and many of their works are listed in the National Register of Historic Places.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
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Weeks and Day was an American architectural firm founded in 1916 by architect Charles Peter Weeks (1870–1928) and engineer William Peyton Day (1886–1966). The firm worked throughout California but mainly in the San Francisco Bay Area, and many of their works are listed in the National Register of Historic Places.2
Founded by Charles Peter Weeks and William Peyton Day in 1916.1
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