The Feast of Weeks (Shavuot in Hebrew, meaning "Weeks") and Pentecost (Pentēkostē in Greek, meaning "Fiftieth [Day]") are two names for the same divine appointment (moed) ordained by God in Leviticus 23 and Deuteronomy 16.
The Great Day of Sukkot—often referenced as the climax of the Feast of Tabernacles—carries profound biblical, historical, and prophetic meaning. It connects the 7-day feast with the unique 8th-day assembly.
A time set aside every week for rest and worship according to biblical commandment. There is not one verse in the entire Bible that God changed The Sabbath.
The Feast of Trumpets, known in the Hebrew Scriptures as Yom Teruah (Day of the Blasting/Shouting) and traditionally observed as Rosh Hashanah, is the first of the biblical Fall Moedim (appointed times).
The Day of Atonement (Yom Kippur, יוֹם כִּפּוּר) is the most solemn and holy day on the biblical calendar. Commanded in Leviticus 16, Leviticus 23:26–32, and Numbers 29:7–11, it takes place on the 10th day of the seventh month (Tishrei).