My birthday is on Octorber 15th .( in -> on )
Itis December 12th today. ( he -> It)
There are two birthdays in January.(birthday-> birthdays )
I am makinga card for you. ( make -> making )
My mother'sbirthday is in June.(mother-> mother's )
加油!不明白再问!如果帮到你,请采纳,谢谢!