The Feasts of the Lord, also known as the Biblical Feasts or Jewish Festivals, are a series of sacred observances instituted by God for the people of Israel. These feasts are outlined primarily in the books of Leviticus, Numbers, and Deuteronomy, and they hold significant theological and prophetic importance within the biblical narrative. They are not only historical commemorations but also serve as foreshadowings of future events in God's redemptive plan.

1. Passover (Pesach):
Passover is the first of the feasts and is celebrated on the 14th day of the first month, Nisan (Leviticus 23:5). It commemorates the Israelites' deliverance from slavery in Egypt, specifically the night when the Lord passed over the houses of the Israelites marked with the blood of a lamb (Exodus 12:13). This feast points to Jesus Christ as the Lamb of God, whose sacrificial death brings deliverance from sin (John 1:29).

2. Feast of Unleavened Bread:
Immediately following Passover, the Feast of Unleavened Bread lasts for seven days, from the 15th to the 21st of Nisan (Leviticus 23:6-8). During this time, the Israelites were to eat bread made without yeast, symbolizing the haste of their departure from Egypt and the call to holiness, as leaven often represents sin (1 Corinthians 5:7-8).

3. Feast of Firstfruits:
Celebrated on the day after the Sabbath following Passover, the Feast of Firstfruits marks the beginning of the barley harvest (Leviticus 23:9-14). The Israelites were to bring the first sheaf of their harvest to the priest as an offering to the Lord. This feast is a type of Christ's resurrection, as He is the "firstfruits of those who have fallen asleep" (1 Corinthians 15:20).

4. Feast of Weeks (Shavuot or Pentecost):
Fifty days after the Feast of Firstfruits, the Feast of Weeks is observed (Leviticus 23:15-21). It celebrates the wheat harvest and the giving of the Law at Mount Sinai. In the New Testament, this feast corresponds to the day of Pentecost, when the Holy Spirit was poured out on the believers (Acts 2:1-4).

5. Feast of Trumpets (Rosh Hashanah):
On the first day of the seventh month, Tishri, the Feast of Trumpets is celebrated with the blowing of trumpets (Leviticus 23:23-25). This feast marks the beginning of the civil new year and calls the people to repentance. Prophetically, it is associated with the future gathering of God's people and the return of Christ (1 Thessalonians 4:16).

6. Day of Atonement (Yom Kippur):
The Day of Atonement, observed on the 10th day of Tishri, is the most solemn of the feasts (Leviticus 23:26-32). It is a day of fasting and repentance, during which the high priest would enter the Holy of Holies to make atonement for the sins of the nation. This feast points to the ultimate atonement made by Christ, our High Priest (Hebrews 9:11-12).

7. Feast of Tabernacles (Sukkot):
Beginning on the 15th day of Tishri and lasting for seven days, the Feast of Tabernacles commemorates the Israelites' wilderness wanderings and God's provision (Leviticus 23:33-43). It is a time of rejoicing and thanksgiving for the harvest. This feast anticipates the future dwelling of God with His people in the Messianic Kingdom (Zechariah 14:16-19).

These feasts, while rooted in the history and culture of Israel, carry profound spiritual significance for believers, illustrating key aspects of God's plan for salvation and His covenant relationship with humanity.