Please help me correct

1. 4of December is a day when I was born.
( 4th of December is the day when I was born.)
2. 23of July is a day I go to visit Japan.
( 23rd of July was the day i went to Japan.)
3. 25 of December is a day when I celebrate Christmas with my friend in Tsim Sha Tsui.
(25th of December was the day when i celebrated Christmas with my friends in Tsim Sha Tsui)
4. Dress Special day is days when I can wear my own clothes go to school.
(Dress Special Day is a day that I can wear my own clothes to school.)
5.13of July is the day when I know my boyfriend.
( 13th of July was the day that I've known my boyfriend.)
6.23of February is the day when I go to my grandma house eat dinner with my family and my cousin family.
(23rd of Feburary was a day that i went to my grandma's house to have dinner with my family.)
7.31ofOctober is a day when I and my friend go to other people house to ask people give ask candy and go to Ocean Park to celebrate Halloween.
(31st of October was a day that we went to others' house for 'Trick or Treat' and to celebrate Halloween.)
8.1of September is a day when I go to new school to study.
(1st of September is a day that i went for a new school.)