Yes, birthdays are real. They are the day you are born. Therefore they are real.
Colby o'donis real birthday is March 14th, 1989. He is 20 years old today. If you want to know more about him go towww.colbyodonis.com.
They have no birthdays because they never age. If they did have birthdays nobody would know.
I'm Pretty sure it's Feb 11 or somewhere around there because during that time you could've made a video on youtube saying happy birthday to him.