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The Hebrew Calendar

The Hebrew calendar is a luni-solar calendar: its months follow the phases of the moon, while its years are adjusted to remain aligned with the solar cycle and the agricultural seasons. This structure matters for the biblical feasts, which are tied to specific harvests.

The Structure of the Year

Lunar Months

Each month begins with the New Moon (Rosh Chodesh). Because a lunar month is about 29.5 days, Hebrew months alternate between 29 and 30 days. In the later rabbinic calendar, most month lengths are fixed, though Cheshvan and Kislev may still vary by a day depending on the year.

Solar Adjustment (Leap Years)

Because 12 lunar months total about 354 days, roughly 11 days short of a solar year, the calendar would drift through the seasons without correction. To prevent this, a 13th month (Adar II) is added seven times every 19 years. This keeps Passover in the spring.

The Two New Years

The Bible explicitly designates Nisan as the first month of the year (Exodus 12:2), and the festival calendar follows this spring starting point. Later Jewish tradition also recognizes a second new year in the autumn, Rosh Hashanah on the first of Tishrei, used for calculating regnal years, sabbatical cycles (Shmita), and jubilees. Whether this Tishrei reckoning is ancient or a later rabbinic development remains debated.

  1. The Religious Year (Nisan): Established by God at the Exodus. It begins in the spring and determines the order of the festivals.
  2. The Civil Year (Tishrei): Traditionally begins in the autumn with Rosh Hashanah. Used for calculating regnal years, sabbatical cycles, and jubilees in later Jewish practice.

The Months and Festivals

1. Nisan (Mar–Apr)

2. Iyyar (Apr–May)

3. Sivan (May–Jun)

4. Tammuz (Jun–Jul)

5. Av (Jul–Aug)

6. Elul (Aug–Sep)

7. Tishrei (Sep–Oct)

8. Cheshvan (Oct–Nov)

9. Kislev (Nov–Dec)

10. Tevet (Dec–Jan)

11. Shevat (Jan–Feb)

12. Adar (Feb–Mar)

The Seven Feasts of Israel

The "appointed times" (moadim) of the LORD (Leviticus 23) are more than holidays; they form a symbolic calendar of God's redemptive work. Many interpreters, especially in Reformed and dispensational traditions, read the spring feasts as typologically fulfilled in Christ's first coming and the autumn feasts as pointing toward His return. This is a theological interpretation rather than an explicit biblical claim, and not all traditions share it.

The Spring Feasts

  1. Passover (Pesach): Commemorates the Exodus from Egypt, when the blood of the lamb on the doorposts caused the angel of death to "pass over" Israel. Jesus was crucified on Passover (1 Corinthians 5:7).

  2. Unleavened Bread (Chag HaMatzot): A seven-day period beginning the day after Passover. Removing leaven symbolizes the removal of sin and the call to holiness. Jesus was buried during this feast.

  3. Firstfruits (Yom HaBikkurim): Observed on the day after the Sabbath following Passover. A sheaf of the first barley harvest is waved before the LORD. Paul explicitly identifies Christ's resurrection with this feast: "Christ has been raised from the dead, the firstfruits of those who have fallen asleep" (1 Corinthians 15:20-23).

  4. Pentecost (Shavuot): Occurs exactly 50 days after Firstfruits (the word Pentecost is Greek for "fiftieth"). It marks the end of the wheat harvest and, by Jewish tradition, the giving of the Law at Sinai. Many Christians note the contrast: after the Exodus, God inscribed His Law on stone tablets; after the resurrection, He poured out His Spirit and wrote His Law on human hearts (Jeremiah 31:33, Acts 2:1-4, 2 Corinthians 3:3).

The Autumn Feasts

  1. Feast of Trumpets (Rosh Hashanah): A day of rest announced by the blowing of the shofar (ram's horn). It marks the beginning of the civil new year and begins ten days of repentance leading to Yom Kippur. Many connect the trumpet blast to the eschatological trumpet of 1 Thessalonians 4:16 and 1 Corinthians 15:52.

  2. Day of Atonement (Yom Kippur): The most solemn day of the year. The High Priest alone entered the Holy of Holies to make atonement for the nation's sins, sprinkling blood on the mercy seat. Hebrews presents Christ's sacrifice as the fulfillment of Yom Kippur: He entered not a man-made sanctuary but heaven itself, once for all (Hebrews 9:11-14).

  3. Feast of Tabernacles (Sukkot): A seven-day celebration in which Israelites lived in temporary booths (succah) to remember the 40 years of wilderness wandering and to celebrate the final ingathering of the harvest. Some interpreters have proposed that Jesus was born during Sukkot, noting that John says "the Word became flesh and tabernacled among us" (John 1:14), though the claim remains speculative.

  4. Eighth Day Assembly (Shemini Atzeret): A distinct feast commanded for the day immediately following Sukkot (Leviticus 23:36, Numbers 29:35). It is often overshadowed by Sukkot but stands on its own as a solemn assembly, a final day of worship after the harvest celebration. Jewish tradition later associated it with the completion of the annual Torah reading cycle.

Later Historical Commemorations

These observances arose after the Mosaic period in response to specific acts of deliverance. Celebrated within Judaism and referenced in Scripture, they are not among the seven commanded moadim of Leviticus 23.

Agricultural and Seasonal Context

The biblical calendar is closely tied to the land of Israel. The "former rains" (autumn) soften the ground for plowing, while the "latter rains" (spring) provide the final moisture needed for grain to ripen before harvest.