וּבַחֹ֙דֶשׁ֙ הַשֵּׁנִ֔י בְּשִׁבְעָ֧ה וְעֶשְׂרִ֛ים י֖וֹם לַחֹ֑דֶשׁ יָבְשָׁ֖ה הָאָֽרֶץ׃ (ס)
Nel mese poi secondo, ai ventisette del mese, la terra era divenuta secca.
Tosefta Rosh Hashanah
How so, "for months"? Even though it says, "on the first month" and "on the second month"*i.e., in various verses in the Torah (see, e.g., Num. 20:1 ("in the first month"), Gen. 8:14 ("in the second month")), in which the ordinals "first" and "second" do not refer to a specific month of the year, but rather indicate the first or second month after a specific event (see Lieberman), they only begin to [formally] count from Nisan, as it says (Ex. 12:2), "This month shall be for you the first (lit., 'head') of the months."