Why is the ninth month called September?
early 14c., "a coming for the purpose of attack," from Old French venue "coming," from fem. past participle of venir "to come," from Latin venire "to come," from PIE root *gwa- "to go, come" (cf. Old English cuman "to come;" see come). The sense of "place where a case in law is tried" is first recorded 1530s. Extended to locality in general, especially "site of a concert or sporting event" (1857). Change of venue is from Blackstone (1768).