Answer:
A day before I presented the speech:
Dear Diary
Something very tragic has happened. My classmate passed away and he had a funeral. I was chosen to make a speech on behalf of my whole class. It was very hard for me. I didn't think anything like this would ever happen. But I was finally able to come up with the right words to describe how I felt.
A day after I presented the speech:
Dear Diary
I presented a speech on behalf of my whole class on my classmate's funeral. I still can't believe it. It was very hard for me. Everyone was crying and so emotional. I can't even imagine how much harder it was for people who were closest to my classmate who passed away. I can't even imagine what they were thinking at the funeral.