Not named in Scripture; added when needed to keep Aviyv in spring
In Scripture, the original names of the months (before the Babylonian exile) are typically referred to by their number (e.g., “first month,” “second month”) or by a few specific names found in the Torah and early historical books. After the Babylonian exile, Hebrew culture adopted Babylonian month names, many of which are still used today (like Nisan, Tammuz, etc.).
Below are the non-Babylonian month names found in the Bible (pre-exile), along with their corresponding month numbers:
May mean “produce” or “rain”; corresponds to Heshvan
9th to 12th
(no specific names)
—
Usually referred to only by number or later Babylonian names
Babylonian Names (Post-Exilic):
These were adopted during or after the Babylonian exile (see Nechemyah and Esther).
Hebrew Month
Babylonian Name
1st
Nisan
2nd
Iyar
3rd
Sivan
4th
Tammuz
5th
Av
6th
Elul
7th
Tishrei
8th
Cheshvan (Heshvan)
9th
Kislev
10th
Tevet
11th
Shevat
12th
Adar (Adar II in leap years)
Summary:
Only Aviyv, Ziv, Eythaniym, and Bul are original month names mentioned before the Babylonian influence. All other months in the Hebrew calendar were numbered or left unnamed until later usage of Babylonian names.