Why is the ninth month called September?
c.1300, verbal use of Old English noun stow "a place" (common in place names) from Proto-Germanic *stowijanan (cf. Old Frisian sto "place," Middle Low German, Middle Dutch, Dutch stouwen "to stow," Old High German stouwen "to stop, check," German stauen "to stow"), from PIE *stau-, from root *sta- "to stand" (cf. Old Church Slavonic stavljo "to place," Lithuanian stoviu "to stand;" see stet). The nautical sense of "put away to be stored, pack" (1550s) was enforced by Dutch stouwen "to cram, pack up close." Related: Stowed; stowing.