There are seven God appointed holidays communicated through the Old Testament Law. The first three spring holidays were fulfilled on the appointed holiday by Jesus Himself. The names of the feasts are: Passover, Unleavened Bread, and First Fruits.
In the Gregorian calendar year of 2018, the holidays occur as follows. Passover essentially begins at sunset on Friday, March 30 on a western calendar. The first day of Unleavened Bread is the next day at sunset on Saturday, March 31. Lastly, the feast of First Fruits starts at sunset on Sunday, April 1. Please note, there is not consensus on these dates within various studies of Judaism and Jewish Messianic believers in Yeshua or Jesus Christ. When in doubt, search for the new moon and full moon. Humanity struggles to keep time as God has directed.
The first of God’s holidays is Passover or Pesach in the Hebrew. The holiday begins on the 14th day of the Hebrew month Nisan (March or April on a Gregorian calendar). There is a play on words in the original Hebrew. A “pesach” is an unblemished lamb which was required for the sacrifice. After the “pesach” was sacrificed, the blood was to be smeared on the wooden posts of the house. When God saw the blood on the door posts, He passed over or “pasach” and the house was spared judgment.
The original directions for the Passover were given to Moses and Aaron in Egypt. The statute and happenings are noted in Exodus 12. God defines the purpose of the holiday to Israel. Exodus 12:26-27a “And when your children say to you, ‘What does this rite mean to you?’ you shall say, ‘It is a Passover sacrifice to the LORD who passed over the houses of the sons of Israel in Egypt when He smote the Egyptians, but spared our homes.’”
The second of God’s holidays is Unleavened Bread or Chag haMatazt in the Hebrew. The holiday begins on the 15th of Nisan and runs for seven days.
The directions of Unleavened Bread are noted in Exodus 12:15-20. The focus of the week is to live a life without leaven, the symbol for sin. Leaven is not to be in the house. Leaven products are not to be consumed. Bread without yeast, matzah, is to be eaten.
The third of God’s holidays is First Fruits or Reshit Katzir in the Hebrew. The one day holiday begins on the day after the Sabbath or Sunday on our calendar.
The directions for First Fruits are noted in Leviticus 23:9-14. The priest is to make a barley offering of the first portion of the harvest to the Lord. The priest intervenes of behalf of the people. The reality of the holiday for the people of Israel is this. The people bring their grain sheaf to the priest. They are to sacrifice a lamb without blemish. The offering is also to be presented with bread and wine.