“These are the Lord’s appointed festivals, the sacred assemblies you are to proclaim at their appointed times” Lev 23:4
SPRING FESTIVALS (Gregorian months: March or April; Lunar month: Nisan): These 3 festivals are on 3 consecutive days.
Passover (aka Pesach).
Passover is mentioned 57 times in the Old and New Testaments.
God’s date: Nisan 14.
“Now this day will be a memorial to you, & you shall celebrate it as a feast to the LORD; throughout your generations you are to celebrate it as a permanent ordinance,” Ex 12:14 NASB. (Also, mentioned in Lev 23:4-14; Ex 12:15-28, 23:15; Num 9:13; Eze 45:21; Luke 22:15; 1Cor 5:7; etc.)
Unleavened Bread (aka Hag haMatzot).
God’s date: Nisan 151-212.
“And on the fifteenth day of the same month [is] the feast of unleavened bread unto the LORD: seven days ye must eat unleavened bread,” Lev 23:6 KJV. (also Deut 16:3; Ex 12:8, 12:15, 13:3, 34:18; 1Cor 5:8)
First Fruits (the beginning of the harvest aka Yom HaBikurim)
God’s date: Nisan 16.
“Then the LORD spoke to Moses, saying, “Speak to the sons of Israel and say to them, ‘When you enter the land which I am going to give to you and reap its harvest, then you shall bring in the sheaf of the first fruits of your harvest to the priest,” Lev 23:9-10.
7th Day (of Unleavened Bread) Celebration.
God’s date: Nisan 212
“On the first day you shall have a holy assembly, & another holy assembly on the seventh day; no work at all shall be done on them, except what must be eaten by every person, that alone may be prepared by you,” Ex 12:16.
During the summer (Gregorian month: May or June; Lunar month: Sivan):
Feast of Weeks (aka Shavuot or Pentecost).
God’s date: Sivan 63
Pentecost means 50, because Pentecost is 50 days after Passover.
The Feast of Weeks is mentioned 5 times in TaNaKh/Old Testament; and Pentecost is 3 times in the Apostolic Scriptures/New Testament.
“You shall celebrate the Feast of Weeks, that is, the first fruits of the wheat harvest, and the Feast of Ingathering at the turn of the year,” Ex 34:22 NASB (also mentioned in Deut 16:10,16; 2 Chronicles 8:13; Num 28:26; Acts 2:1, etc.)
FALL FESTIVALS (Gregorian months: September or October; Lunar month: Tishrei):
Feast of Trumpets (aka Yom Teru’ah or Rosh haShanah):
God’s date: Tishrei 14
“Say to the Israelites: ‘On the first day of the seventh month you are to have a day of sabbath rest, a sacred assembly commemorated with trumpet blasts. Do no regular work, but present a food offering to the Lord,’” Lev 23:24-5. (Also, it is mentioned in Num 10:10, 29:1-6.)
Day of Atonement (aka Yom Kippur):
God’s date: Tishrei 105
“The tenth day of this seventh month is the Day of Atonement. Hold a sacred assembly and deny yourselves, and present a food offering to the LORD. Do not do any work on that day, because it is the Day of Atonement, when atonement is made for you before the LORD your God,”Lev 23:27-8. (Also, mentioned in verses 16:29-34, 23:27-32, 25:9; Num 29:7; Heb 9:11-14, 22-24, 10:1-25.)
Feast of Booths (aka Sukkot or Feast of Tabernacles):
God’s date: Tishrei 156-227
“Say to the Israelites: ‘On the fifteenth day of the seventh month the LORD’s Festival of Tabernacles begins, & lasts for seven days. The first day is a sacred assembly; do no regular work,”Lev 23:34-5. (Also, it is mentioned in verses 36-44; Num 29:12; Deut 16:13-15; Zech 14:16-19: consequences for not celebrating the festival; John 7:2-52.)
Sh’mini Atzeret: 8th day
God’s date: Tishrei 227
“On the 8th day you shall have a holy convocation & present an offering by fire to the LORD; it is an assembly. You shall do no laborious work,” Lev 23:36b-c.
#1-7 God’s 7 Annual High Sabbaths, aka Shabbat Shabbatons, Sacred Assemblies, Holy Convocations.