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Why Babylonian Names for Jewish Months?

Why Babylonian Names for Jewish Months?


In the pre-Babylonian era, we find in the Scriptures only four months on the calendar that are identified by name:

The first month (Nissan): Aviv1
The second month (Iyar): Ziv2
The seventh month (Tishrei): Eitanim3
The eighth month (Cheshvan): Bul4

The other months were just known by their place in the calendar—e.g., third month, fourth month—starting from the first month: first by virtue of the fact that it is the month when our nation left Egypt, the month when we became a nation.

(Apparently, even the four months that had names were more often than not referred to by their numeric place on the calendar, with the names serving as secondary titles accompanying their numbers.)

The Jerusalem Talmud5 tells us that the modern names of the months “came up [to Israel] with [the returnees] from Babylon,” at the onset of the second Jewish commonwealth, approximately 350 BCE.6

So, why did we begin to use these names? Why didn’t we stick with the biblical practice of referring to months by their number?

Nachmanides7 suggests that this is consistent with Jeremiah’s prophecy: “Therefore, behold days are coming, says G‑d, and it shall no longer be said [by one who wishes to pronounce an oath], ‘As G‑d lives, who brought up the children of Israel from the land of Egypt,’ but rather, ‘As G‑d lives, who brought up the children of Israel from the north land [Babylon] . . .’”8

The original system was to count months in numeric order, starting from Nissan. Thus, any time a person mentioned a month, he was in effect recalling the exodus from Egypt: we are in, say, the sixth month—six months since the month of the Exodus.9 Thus, the numeric naming served as a constant reminder of our deliverance from Egypt.

After we were delivered from Babylonian captivity, however, we started using the names that we became used to using in Babylon. And now, these names served to remind us that G‑d has redeemed us from this second exile.

I hope that I’ve been helpful today.

Yours truly,

Rabbi Menachem Posner


Exodus 13:4. Literally, “spring” or “ripening.”


I Kings 6:1 and 6:37. Literally, “radiance,” so called because it is the time when the trees become radiant with blossoms.


I Kings 8:2. Literally, “strong ones,” so called because the ripe fruit are at the height (strength) of their goodness. (Our sages [Talmud, Rosh Hashanah 11a] attribute the names Ziv and Eitanim to the births of Abraham, Isaac and Jacob—the radiant and strong ones—in these months.)


I Kings 6:38. Related to the word for “withering,” and so called because at that time the branches and stubble in the field begin to wither.


Rosh Hashanah 1:2.


While many maintain that the names are actually taken from the Babylonian tongue, the Rebbe maintains (Likkutei Sichot, vol. 23, pp. 214ff) that it is likely that many (if not all of) these names are actually Hebrew, but that the practice of calling months by names instead of their numeric position on the calendar originated in Babylon.
See also Tammuz—Time for Transformation.


Commentary to Exodus 12:2.


For similar reason, Nachmanides argues, we have no names for the days of the week. Sunday is called “the First Day,” Monday is “the Second Day,” and so on—because we are constantly counting down to the Shabbat. Every time we mention the day of the week—any day of the week—we are fulfilling the divine precept (Exodus 20:8) to always “remember the Shabbat day to keep it holy.”

Rabbi Menachem Posner serves as staff editor for
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Discussion (22)
December 3, 2016
Why do Hebrew months have pagan names
With all due respect Rav, I think that's a poor excuse to continue to use pagan names; being reminded of what got one in a dire predicament is a great way, to keep one from repeating the same mistake, imho ... that's kind of one of our main problems ie, re-inventing the wheel...
November 7, 2016
Actually, the name Tammuz comes from the Aramaic word "heat," and it is connected to the heat of the summer months. The source for the pagan deity with that name comes from people offering fire, similar to the heat of the summer.
Eliezer Zalmanov
October 31, 2016
It's not called Heshvan and we add the Mar because it's sad that it has no holidays. It's called Marheshvan because this is the Babylonian name for Eighth (שון = שמיני) Moon/Month (מרח/ירח).

Also interesting to note, the name Elul means Harvest (end of summer/harvest season). Tammuz - was the name of a Babylonian deity, etc.
August 8, 2016
Av in Hebrew means father. Please see for the inner meaning why this month is known by the word "father."

Simcha Bart
Simcha Bart
August 7, 2016
It means "father" in Hebrew.
August 5, 2016
Meaning of Av
Does Av mean fire? Where can I get the meaning of the word?
Darya Hupp
March 24, 2015
third month is Sivan
Then were the king's scribes called at that time in the third month, that is, the month Sivan, on the three and twentieth day thereof; and it was written according to all that Mordecai commanded unto the Jews, and to the lieutenants, and the deputies and rulers of the provinces which are from India unto Ethiopia, an hundred twenty and seven provinces, unto every province according to the writing thereof, and unto every people after their language, and to the Jews according to their writing, and according to their language. Esther 8:9
Beryl Boanerges
October 6, 2014
Thank you!
Wow, than you so much, I was very confused about this! Unfortunately, non-Jewish sources love to say that these babylonian month names indicate that Judaism evolved from a Babylonian religion, but not so!
June 11, 2013
To Yankel
Both Zecharia and Esther were written after we went to Babylon.
June 9, 2013
what about Kislev? And Shevat? They are in Zechariah?
Yankel Lipskier