YOU SAID:
my birthday is in two days
INTO JAPANESE
私の誕生日は二日後です
BACK INTO ENGLISH
My birthday is two days later
INTO JAPANESE
私の誕生日は2日後です
BACK INTO ENGLISH
My birthday is 2 days later
INTO JAPANESE
私の誕生日は2日後です
BACK INTO ENGLISH
My birthday is 2 days later
That didn't even make that much sense in English.