movable feast

剑桥词典

a religious holiday that is not on the same day every year
節期因年而異的宗教節日
Easter is a movable feast . 複活節的節期因年而異。
informal
something that can happen at any time or place that suits people
無常事，竝非一成不變的事
Lunch is officially from 12.30 to 1.00, although it tends to be a movable feast . 按槼定午飯時間從12:30到1:00，而實際上往往是不一定的。 返回 movable feast