וַיָּבֹ֥א יְרוּשָׁלִַ֖ם בַּחֹ֣דֶשׁ הַחֲמִישִׁ֑י הִ֛יא שְׁנַ֥ת הַשְּׁבִיעִ֖ית לַמֶּֽלֶךְ׃
이 에스라가 올라왔으니 왕의 칠년 오월이라
Rashi
in the fifth month i.e., the month of Av, for the first of the month of Nissan was the beginning of their ascent from Babylon, and on the first of the month of Av they arrived in Jerusalem.