• Wishing my brother-in-law a happy birthday. Remember, age is just a number that determines how early you eat dinner.

  • To my brother-in-law, happy birthday! Wishing you a day free from in-laws and full of fun. Just kidding, we’re watching you.

  • Happy birthday, brother-in-law! Here’s to celebrating your day with the enthusiasm I reserve for when my favorite team wins.

  • Happy birthday to a brother-in-law who’s smart, funny, and good-looking. From one great guy to another, hope your day is amazing!

  • Happy birthday, brother-in-law! May your day be as unexpected and full of surprises as our family gatherings.

  • To my brother-in-law, happy birthday! May your day be as bright and promising as your attempts to beat me at video games.

  • Wishing a very happy birthday to my brother-in-law, who proves that even family obligations can turn into genuine friendships. Or tolerable co-existences.

  • Happy birthday, brother-in-law! Here’s to another year of surviving my sister. You deserve a medal, but cake will have to do.

  • Happy birthday to a brother-in-law who’s almost as amazing as I am. Almost. Hope your day is nearly as awesome too.

  • To the man who has everything, including the world’s greatest sister/brother-in-law (me), happy birthday!