YOU SAID:
I went to my grandmothers birthday
INTO JAPANESE
おばあちゃんの誕生日に行ってきました
BACK INTO ENGLISH
I went there for my grandma's birthday
INTO JAPANESE
おばあちゃんの誕生日に行きました
BACK INTO ENGLISH
went for grandma's birthday
INTO JAPANESE
おばあちゃんの誕生日に行きました
BACK INTO ENGLISH
went for grandma's birthday
Well done, yes, well done!