17 Sibling Day Messages for the Sweet, the Chaotic, and the “I’m Clearly the Favorite”

Sibling Day is more than a hashtag—it’s an excuse (ahem, opportunity) to let your sibling know you’re thinking about them. Whether they were your childhood partner in crime, your built-in rival, or someone who showed up for you when they didn’t have to, today’s the day to say: Hey, I see you. I love you.

Not sure how to celebrate? Keep it simple:

• Send them a message that makes them laugh (or cry—just a little)

• Make plans for lunch, even if it’s over FaceTime

• Surprise them with a sweet treat or a nostalgic throwback gift

• Forward them one of the messages below that feels so them

Because at the end of the day, Sibling Day is just a moment to say “you matter.”

For the Sweetly Savage Ones

Sibling love… with a side of sass.

• To the sister who once threw a hairbrush at my head & now sends me affirmations… luv u. Happy Sibling Day!

• To the person who told my childhood crush I wet the bed… still not over it. Happy Sibling Day.

• I watched, I learned, I stole your stuff. Happy Sibling Day!

• I walked so you could run. And by run, I mean get away with everything. Happy Sibling Day!

For the Emotionally Significant Ones

For the siblings who shaped you, supported you, or stood in when they didn’t have to.

• You raised me when you didn’t have to. I see you. I love you. Happy Sibling Day!

• You never said much, but you always showed up. Happy Sibling Day!

• To the person who’s known every version of me—and never let me forget any of them. Happy Sibling Day.

For the Built-In Best Friend Energy

These are for the ones who laughed with you, fought you, and still pick up your calls.

• You’ve always been my built-in best friend. And my built-in bully. Love you anyway. Happy Sibling Day!

• We’ve shared snacks, secrets, and trauma. Thanks for being my lifelong co-conspirator. Happy Sibling Day!

• We’ve fought over everything—remote controls, car rides, who was adopted. But I’d still choose you every time. Happy Sibling Day!

• You’re the only person who can make me laugh & roll my eyes in the same breath. A true talent. Happy Sibling Day!

For the Identity-Crisis Energy

Middle children, youngest legends, and those of us clearly born to be the favorite.

• Happy Sibling Day from the middle child. Not that anyone asked. Happy Sibling Day.

• Happy Sibling Day to the chosen one. Some of us had to build character. Happy Sibling Day.

• To my siblings: Mom didn’t say it out loud, but we all know I’m the favorite. Happy Sibling Day!

For the Distant but Deeply Connected

For the ones far away, but never far from your heart.

• Different cities, same unspoken understanding. Miss you more than I ever say. Happy Sibling Day!

• Gone, but never not with me. Still my sibling. Always will be. Happy Sibling Day.

For the Twins / Practically Twins

Because some sibling bonds are that close.

• Born minutes apart, still arguing over who’s wiser. (It’s me.) Happy Sibling Day!

For the Not-by-Blood, but Always Family

Chosen family deserves to be celebrated too.

• We’re not related by blood, but you’ve always felt like family. Happy Sibling Day!

Feeling inspired to reach out to your sibling? Share one of these messages, drop them a note, or plan something small to show you’re thinking of them.

And when it’s time to find the perfect gift that says “you matter to me”—without you overthinking it—Gibyl’s here for that too. Join the waitlist to be first in line when we launch.