In Lev. 23 we find YAHWEH speaking to Moshe about these feast....
Lev 23:23 And יהוה spoke to Mosheh, saying,
Lev 23:24 "Speak to the children of Yisra’ĕl, saying, ‘In the seventh month, on the first day of the month, you have a rest, a remembrance of blowing of trumpets, a set-apart gathering.
Lev 23:25 ‘You do no servile work, and you shall bring an offering made by fire to יהוה.’ "
This is the Feast of Trumpets. it begins with the sighting of the new moon. It is called Rosh Hashanah, which means "head of the new year" it is also called Yom Teruah" meaning "a day of blowing".This is the beginning of the Hebrew "civil" new year....Tishri 1. Following this comes the "10 days of awe" and Yom Kippur on Tishri 10, or the Day of Atonement, then The Feast of Tabernacles.
Feast of Trumpets
Yom Teruah - Ethanim 1 - September 10
Atonement
Yom Kippur - Ethanim 10 - September 19Sukkoth
Feast of Tabernacles
Sukkoth - Ethanim 15-21 - September 24-30
Last Great Day
Atsarah - Ethanim 22 - October 1
Feast of Dedication
Chanukah - 9th Month 25 day - December 2-9
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