为什么my birthday is February 11th,可以不用加on,在when is the volleyball game?It's on January 1st要加on呢?请说明理由和方法.

my birthday is on october 27.my birthday is october 27哪个对?为什么 Today is my birthday! My birthday is My birthday is months My birthday is on my birthday is month my birthday is february A_____1st is my birthday. My mother is birthday is Tomorrow is my birthday Happy birthday! 初一英语中有一句话my birthday is May 2nd,为什么不说my birthday is on May 2nd? 那为什么录音机里读的也是My birthday is December 17呢?而不是My birthday is December the seventeenth my birthday is ____June 介词 My birthday is june t----- June___(24)is my birthday My birthday is ( ) june twejfth Today is my birthday是什么意思 My birthday is March December.