Every evening (otan opse egeneto). Literally, whenever evening came on or more exactly whenever it became late. The use of otan (ote an) with the aorist indicative is like opou an with the imperfect indicative (eiseporeueto) and osoi an with the aorist indicative (hpsanto) in Mark 6:56 . The use of an makes the clause more indefinite and general, as here, unless it renders it more definite, a curious result, but true. Luke 21:37 has the accusative of extent of time, "the days," "the nights." The imperfect tense he (or they) would go (exeporeueto, exeporeuonto) out of the city suggests "whenever" as the meaning here.