Months: The Jews Computed Time By
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In the ancient Jewish calendar, months were primarily lunar, based on the cycles of the moon. This method of timekeeping is evident throughout the Old Testament and is integral to understanding the timing of Jewish festivals, religious observances, and historical events.

Lunar Calendar System

The Jewish calendar is a lunisolar calendar, meaning it is based on the phases of the moon while also aligning with the solar year. Each month begins with the new moon, and a typical month lasts either 29 or 30 days. This results in a lunar year of approximately 354 days, which is about 11 days shorter than the solar year. To reconcile this difference and ensure that festivals remain in their appropriate seasons, an additional month, known as Adar II, is added approximately every three years.

Biblical References to Months

The Bible frequently references months in the context of religious observances and historical events. For example, in Exodus 12:2 , God instructs Moses and Aaron, "This month is to be the beginning of months for you; it is the first month of your year." This refers to the month of Nisan, which marks the beginning of the religious calendar and is significant for the celebration of Passover.

The names of the months are mentioned in various parts of the Bible, often in relation to significant events. For instance, in 1 Kings 6:1 , it is recorded, "In the four hundred and eightieth year after the Israelites had come out of the land of Egypt, in the fourth year of Solomon’s reign over Israel, in the month of Ziv, the second month, he began to build the house of the LORD."

Religious Significance

Each month in the Jewish calendar holds religious significance, often marked by specific festivals and observances. The month of Tishri, for example, is particularly important as it includes the High Holy Days: Rosh Hashanah (the Jewish New Year), Yom Kippur (the Day of Atonement), and Sukkot (the Feast of Tabernacles). Leviticus 23:24 commands, "Speak to the Israelites and say: On the first day of the seventh month you are to have a day of rest, a sacred assembly announced by trumpet blasts."

Intercalation and Adjustments

To maintain alignment with the solar year, the Jewish calendar employs a system of intercalation. This involves adding an extra month, Adar II, in leap years. This adjustment ensures that the major festivals, particularly those with agricultural significance, occur in their proper seasons. The practice of intercalation is not explicitly detailed in the Bible but is a well-established tradition in Jewish history.

Cultural and Historical Context

Understanding the Jewish computation of time is crucial for interpreting biblical narratives and the timing of events. The use of a lunar calendar reflects the agrarian lifestyle of ancient Israel, where the cycles of the moon were closely tied to agricultural activities and religious observances. The calendar system also underscores the Jewish people's connection to God's creation, as seen in Genesis 1:14 : "And God said, 'Let there be lights in the expanse of the sky to separate the day from the night, and let them serve as signs to mark seasons and days and years.'"

In summary, the Jewish computation of time by months is a complex system that integrates lunar cycles with solar adjustments, deeply rooted in religious tradition and biblical instruction. This system not only structured the daily life of ancient Israel but also continues to influence Jewish religious practices today.
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Judges 11:37
And she said to her father, Let this thing be done for me: let me alone two months, that I may go up and down on the mountains, and mourn my virginity, I and my fellows.
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1 Samuel 6:1
And the ark of the LORD was in the country of the Philistines seven months.
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1 Kings 4:7
And Solomon had twelve officers over all Israel, which provided victuals for the king and his household: each man his month in a year made provision.
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Jews.
... the siege, which lasted nearly five months, upwards of eleven hundred thousand Jews
perished ... was the bloody and tremendous consummation, is computed to have ...
//christianbookshelf.org/hayward/the book of religions/jews.htm

Travelling in Palestine --Roads, Inns, Hospitality, Custom-House ...
... than did the Gospel of Christ to the Jews of Palestine. ... from five to eight such changes
being computed for a ... with sufficient corn to last eight months, and the ...
/.../sketches of jewish social life/chapter 4 travelling in palestineroads.htm

The Jewish Institutions and Laws of Far Higher Antiquity than the ...
... three hundred and thirty-eight years and three months. ... the time that Moses brought
out the Jews from Egypt ... and Casian, a hundred and twenty years are computed. ...
/.../the stromata or miscellanies/chapter xxi the jewish institutions and.htm

Alexandria and Rome - the Jewish Communities in the Capitals of ...
... to feed the capital for four months of the ... Any temporary measures against the Jews
can, therefore, scarcely be ... and of about 1,575 tons, and is computed to have ...
/.../the life and times of jesus the messiah/chapter v alexandria and rome.htm

Acts XIX
... and spoke boldly for about three months, discussing and ... 17) And this became known
to all the Jews and Greeks ... the value of the books was computed were doubtless ...
/.../mcgarvey/a commentary on acts of the apostles/acts xix.htm

The Three Parables of Warning: to the Individual, to the Nation ...
... of the year, [4450] the two barren months being probably ... were commonly no hedges
round the fields of the Jews. ... double part of an eldest son was computed in the ...
/.../the life and times of jesus the messiah/chapter xvi the three parables.htm

The Mystery
... cast them out unburied, and especially among the Jews, as the ... marked, not by hours,
but rather by months, or at ... that the time is here to be computed, not from ...
//christianbookshelf.org/mede/a key to the apocalypse/the mystery.htm

The Cause and Cure of Earthquakes
... Among them were several Jews, who kneeled and answered ... where many continued above
two months; the shakes ... part of the inhabitants (who were computed near sixty ...
/.../wesley/sermons on several occasions/sermon 129 the cause and.htm

The Great Controversy
... 7:25), the "forty and two months" (Revelation 11 ... indeed celebrate the Sabbath with
the Jews.""Johann Joseph ... every version in every land, were computed at not ...
//christianbookshelf.org/white/the great controversy/the great controversy.htm

The Evening of the Third Day in Passion-Week - on the Mount of ...
... torments of Gehenna would last for twelve months, after which ... consoling fact: despite
the persecution of Jews and Gentiles ... [5360] If these are computed to last ...
/.../edersheim/the life and times of jesus the messiah/chapter vi the evening of.htm

Resources
What is the structure of the Jewish calendar? | GotQuestions.org

How long was Job's suffering? | GotQuestions.org

What is the Tribulation? How do we know the Tribulation will last seven years? | GotQuestions.org

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