YOU SAID:

I am at my dads work place for my birthday.

INTO JAPANESE

私は父の誕生日のために職場にいます。

BACK INTO ENGLISH

I am at work for my father's birthday.

INTO JAPANESE

私は父の誕生日のために働いています。

BACK INTO ENGLISH

I work for my father's birthday.

INTO JAPANESE

私は父の誕生日に働いています。

BACK INTO ENGLISH

I work on my father's birthday.

INTO JAPANESE

私は父の誕生日に働いています。

BACK INTO ENGLISH

I work on my father's birthday.