YOU SAID:

i took a part of 9 11 last year yesterday

INTO JAPANESE

私は昨日昨年9月11日に参加した

BACK INTO ENGLISH

I participated yesterday last September 11

INTO JAPANESE

私は昨日9月11日に昨日参加した

BACK INTO ENGLISH

I participated yesterday on September 11th yesterday.

INTO JAPANESE

私は昨日9月11日に昨日参加しました。

BACK INTO ENGLISH

I participated yesterday on September 11th yesterday.