Exodus 23:14-17

NSB(i) 14 »Celebrate three festivals a year to honor me. 15 »In the month of Abib, the month in which you left Egypt, celebrate the Festival of Unleavened Bread in the way that I commanded you. Do not eat any bread made with yeast during the seven days of this festival. Never come to worship me without bringing an offering. 16 »Celebrate the Harvest Festival when you begin to harvest your crops. Celebrate the Festival of Shelters in the autumn, when you gather the fruit from your vineyards and orchards. 17 »All your males should appear before Jehovah God three times a year.
Reformed Dating