My birthday 我的生日（英语作文） 【我的生日是12月4号】

Hello,my name is * * *.My birthday is in December 1999,the no.4.In China,it is the day in winter.On this day,usually snows.I usually in the birthday this day open birthday party.I with my good friends and family birthday.On the same day we would be very happy birthday!This is my birthday.How about you?
再问： 感谢你的回答哦！不过，我有一个不懂的地方，希望你解答哦！ 在你的回答中： “the no. 4.”这是什么意思？