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.
Weeks and Day partnered in 1916, Weeks as designer and Day as engineer. The firm specialized in live and movie theaters, and designed several movie palaces, mostly in the San Francisco Bay Area but also in Los Angeles and San Diego. They also designed numerous hotels and other buildings.[citation needed]
Weeks and Day was most active immediately before Weeks' death in 1928. Day continued the firm after Week's death, with the firm ultimately closing in 1953.[2]