These are special years now, where you are neither very, very young nor very, very old. But for you, I hope that they are very, very happy.

Your sweet childhood is no more. It’s time to lament the end of your innocence. Still, Happy 18th!

Welcome to adulthood! I wish you a great 18th birthday and hope each and every dream comes true.

Personally, I couldn’t care less if you were 18 or 80. It all means the same thing to me: time to party!

Um. I think you’re awesome. Happy birthday!

Keep this up and soon you’re going to be 100 years old.

Just like your nose and ears, my love for you will only grow with the years.

You can grow older but please please please please please please please never get old.

I hope you’ll keep an open heart and open spirit as you gain life experience.

My only goal today is to make sure you have nothing to worry about. Save your worrying for tomorrow.

Your age only matters to the police and insurance companies. To people who love you, you will always be ageless.

Today, let’s not say 18 years old and instead say 18 years young.

Happy, happy birthday for a dear, dear friend!

Since it’s your 18th birthday, I’m wishing 18 times for your continued success!

Thank you for all the joy you’ve brought us through the years. You have a special heart.

The day you understood that everyone is imperfect, you became a teenager. The day you forgive them is the day you will be an adult.

Now that you’re 18, you need to be careful—your parents can legally throw you out! Happy 18th!

Now that you’re 18, you need to be careful about the mischief you cause or else. . . we can sue you!

On your 18th birthday, we wish you a fantastic party and an even better year!