One possible version:
My favorite day
My name is Mike. Sunday is my favorite day, because I have an English party with my classmates. On Sunday, I play basketball with Jim and play games with Nick. Nick is a white dog. I like it very much. I have a book sale in our school library. I also go to the store with my mom on Sunday. We buy some fruit and vegetables. They are my favorite. I have a good time on Sunday. I like Sunday.