YOU SAID:
I am so incredibly happy due to the events that have occurred this day.
INTO JAPANESE
この日起こった出来事のおかげで、私はとても幸せです。
BACK INTO ENGLISH
Thanks to the events that happened on this day, I am very happy.
INTO JAPANESE
この日起こった出来事のおかげで、とても嬉しいです。
BACK INTO ENGLISH
I am very happy because of the events that happened on this day.
INTO JAPANESE
この日に起こった出来事のおかげでとても嬉しいです。
BACK INTO ENGLISH
I am very happy because of the events that happened on this day.
That didn't even make that much sense in English.