The importance of a birthday is for you to turn an older age and get harder questions than before. The importance of a birthday is to use it as way to acknowledge that we only have so many days on this earth.Weather you use it to celebrate, sleep in, take the day off of work, anything but ignore it.Its your day, enjoy it, you only get one per year.he importance of a birthday is for you to turn an older age and get harder questions than before. The importance of a birthday is to use it as way to acknowledge that we only have so many days on this earth.