YOU SAID:

I didn't find out that pizza was magical until my twin cousins' half birthday

INTO JAPANESE

双子のいとこのハーフバースデーまで、ピザが魔法のようなものだとは知りませんでした。

BACK INTO ENGLISH

Until my twin cousin's half-birthday, I didn't know that pizza was magical.

INTO JAPANESE

双子のいとこがハーフバースデーになるまで、ピザが魔法のようなものだとは知りませんでした。

BACK INTO ENGLISH

I didn't know that pizza was magical until my twin cousins had half-birthday.

INTO JAPANESE

私の双子のいとこがハーフバースデーになるまで、ピザが魔法のようなものだとは知りませんでした。

BACK INTO ENGLISH

I didn't know that pizza was magical until my twin cousins had half-birthday.