Exodus 23:15-17 Living Bible (TLB)
15 “The first is the Pilgrimage of Unleavened Bread, when for seven days you are not to eat bread with yeast, just as I commanded you before. This celebration is to be an annual event at the regular time in March, the month you left Egypt; everyone must bring me a sacrifice at that time. 16 Then there is the Harvest Pilgrimage, when you must bring to me the first of your crops. And, finally, the Pilgrimage of Ingathering at the end of the harvest season. 17 At these three times each year, every man in Israel shall appear before the Lord God.