The book Daily Life in the Time of Jesus notes that flocks lived in the open air from "the week before the Passover [late March]" through mid-November.
(Luka 2:8) Incwadi ethi Daily Life in the Time of Jesus ibonisa ukuthi imihlambi yayihlala endaweni evulekile kusukela " ngesonto elingaphambi kwePhasika [ngasekupheleni kuka-March] " kuze kube maphakathi no-November.