You’ll soon find out that being an adult is much less exciting than being a child. But shhhh, don’t tell anyone. That’s our secret.

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

Welcome to manhood. It’s time to leave childish things behind (even video games). Happy 18th!

We’ve known you were wonderful for each of the past 18 years. Hope you have a great party tonight!

Great! Now I can arrest you legally ;)

Welcome to the adulthood club, where we only have one rule: No rules! Happy 18th birthday, dear!

Now that the most carefree days of your life are behind you, get ready for the burden of adult life.

Another year older, and you just keep getting more amazing! I can’t wait to see what this year brings for you.

On your first day of adulthood, I hope you enjoy the day and night as much as possible. And make sure you leave the tab for someone else.

Welcome to the club of adulthood. However, we’d prefer it if you didn’t let the police know because otherwise we’ll soon meet you behind bars.

I hope you wake up tomorrow and realize how lucky you are to have had me as a friend for so many years. But that’s tomorrow. Today is about you.

Now is the time to decide what kind of person you are going to be, which is much more important than deciding on your career. Choose wisely!

The choices you make today determine where you’re going to be tomorrow. Make good ones!

Now you’re an adult. Please grow up, but never grow old. Please.

Happy birthday! Best wishes for your 18th!

Happy 18th birthday to one of my dearest friends! Today is surely a day to celebrate!

Happy birthday to one of the coolest people I know!

You caused so much mischief as a child, I’m scared to see what you’re going to do as an adult.

I like so many things about you, they won’t all fit in this card. Just know that I wish you a very happy birthday!