Why is the ninth month called September?
1650s, "a show of bravado," also "an assembly of troops for inspections," from French parade "display, show, military parade," from Middle French parade (15c.), or from Italian parate "a warding or defending, a garish setting forth," or Spanish parada "a staying or stopping," all from Vulgar Latin *parata, from Latin parere "arrange, prepare, adorn" (see pare), which developed widespread senses in Romanic derivatives. Non-military sense of "march, procession" is first recorded 1670s.
1680s (transitive), from parade (n.). Intransitive sense from 1748. Related: Paraded; parading.