Answer:
Say what you can remember. If you can't remember anything, just make it up. For example, you could say that you are sad about not seeing your friends, Bam. There you go.
example
format of diary entry:
Monday,22 August, 2017
Dear diary
Content: for example : Today was my last day in my school. I was very happy to see and enjoy my last day. I was upset to leave my school but I was also happy to start my new journey of life which was life after graduation. I was hoping well wishes for everyone. I really enjoyed my day in my school.
ash lemon.
Note: diary is always written in past.