Dear Jim, I am writing to invite you to my 15th birthday party on Saturday, December 14th. I will have a meal in a restaurant with a few friends and then we will have a party at my house. I would like you to come if you can. If you want to stay at my home for a night, please tell me. I will prepare it for you. The meal will begin at 7:00 pm. We will have the birthday party at my house at about 8:30 pm. My mother will make a birthday cake and some snacks (点心) for us. I think they must be delicious. I hear that you have some nice CDs. Could you please bring them to my party and enjoy the music with us? Hope you can come! Yours, Bob What time will the party begin?