This chapter is the calendar of the whole Jewish year, and every feast in it is still on the calendar today. In order: the weekly Sabbath; Passover and Unleavened Bread in spring (now kept as the seder meal and a week without leavened bread); Firstfruits (the first sheaf of barley waved before God); Weeks, in Hebrew Shavuot, fifty days later (Christians know the Greek name: Pentecost); then in autumn the Day of Trumpets (now Rosh Hashanah, the Jewish new year, announced by the ram's-horn trumpet called a shofar), the Day of Atonement (Yom Kippur, the great fast), and Tabernacles, in Hebrew Sukkot, when families still build and eat in leafy backyard booths for a week, remembering the wilderness.

So when the New Testament says Jesus or Paul went up for “the feast,” it means one of these appointments: the same calendar, kept for over three thousand years.