וַיָּבֹ֣אוּ בְנֵֽי־יִ֠שְׂרָאֵל כָּל־הָ֨עֵדָ֤ה מִדְבַּר־צִן֙ בַּחֹ֣דֶשׁ הָֽרִאשׁ֔וֹן וַיֵּ֥שֶׁב הָעָ֖ם בְּקָדֵ֑שׁ וַתָּ֤מָת שָׁם֙ מִרְיָ֔ם וַתִּקָּבֵ֖ר שָֽׁם׃
At ang mga anak ni Israel, ang buong kapulungan, ay dumating sa ilang ng Zin sa unang buwan; at ang bayan ay nanirahan sa Kades. At doon namatay si Miriam, at doon siya inilibing.
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."