Exodus 34:22
22And thou shalt observe the feast of weeks, of the first fruits of wheat harvest, and the feast of ingathering at the year’s end. 23Thrice in the year shall all your men children appear before the Lord GOD, the God of Israel. 24For I will cast out the nations before thee, and enlarge thy borders: neither shall any man desire thy land, when thou shalt go up to appear before the LORD thy God thrice in the year. 25Thou shalt not offer the blood of my sacrifice with leaven; neither shall the sacrifice of the feast of the passover be left unto the morning.
Passover – Last Supper (april)+ First Fruits of Wheat Harvest – Day after Passover
Luke 2:40-43 | Luke 22:7 – 22:8 | Luke 22:14-15
Shavuot – Pentecoste – Feast of Weeks – fiftieth day (Tyndale 1526) June
Shavuot marks the giving of the Torah on Mt. Sinai
It commemorates the descent of the Holy Spirit upon the Apostles and other followers of Jesus Christ while they were in Jerusalem celebrating the Feast of Weeks, as described in the Acts of the Apostles (Acts 2:1–31)
John 14:15
Jesus Promises the Holy Spirit
15 “If you love me, keep my commands. 16 And I will ask the Father, and he will give you another advocate to help you and be with you forever— 17 the Spirit of truth. The world cannot accept him, because it neither sees him nor knows him. But you know him, for he lives with you and will be[c] in you. 18 I will not leave you as orphans; I will come to you. 19 Before long, the world will not see me anymore, but you will see me. Because I live, you also will live. 20 On that day you will realize that I am in my Father, and you are in me, and I am in you. 21 Whoever has my commands and keeps them is the one who loves me. The one who loves me will be loved by my Father, and I too will love them and show myself to them.”
Gevurot 2 Orthodox Jewish Bible 2 | Acts 2:2
1And when the day of Shavuot/Pentecost was fully come, they were all with one accord in one place. 2And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. 3And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. 4And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
Rosh Hashanah – New Year – September/October
The term Rosh Hashanah in its current meaning does not appear in the Torah. Leviticus 23:24 refers to the festival of the first day of the seventh month as zikhron teru’ah (“a memorial of blowing [of horns]”) Numbers 29:1 calls the festival yom teru’ah (“day of blowing [the horn]”).
The Feast of Trumpets is recorded in the book of Leviticus 23:23-25 and also in Numbers 29:1-6. The term Rosh Hashanah, meaning “the beginning of the year,” appears only in Ezekiel. 40:1, where it refers to the general time of year, and not specifically to the Feast of Trumpets
Sukkot – Feast of Ingathering – October
Sukkot celebrates the earth’s harvest (Deuteronomy 6:13-15) and it is a time to thank God for His blessings. But more importantly, Sukkot commemorates Israel’s deliverance from Egypt, as described in Leviticus 23:34-44.