YOU SAID:

the first day of the month is never

INTO JAPANESE

月の最初の日は決してない

BACK INTO ENGLISH

Never the first day of the month

INTO JAPANESE

月の初日は絶対にしない

BACK INTO ENGLISH

I will never do the first day of the month

INTO JAPANESE

私はその月の初日をやるつもりはない

BACK INTO ENGLISH

I do not intend to do the first day of the month

INTO JAPANESE

私は月の初日をやるつもりはない

BACK INTO ENGLISH

I do not intend to do the first day of the month