The postexilic names of the remaining five months appear in the Jewish Talmud and other works. They are Iyyar, the 2nd month; Tammuz, the 4th; Ab, the 5th; Tishri, the 7th; and Heshvan, the 8th. The 13th month, which was intercalated periodically, was named Veadar, or the second Adar.

Eventually the length of most of the months was fixed as having a specific number of days. Nisan (Abib), Sivan, Ab, Tishri (Ethanim), and Shebat regularly had 30 days each;