Happy Birthday, Sister: Birthday Card Messages, Gift Ideas, and More

If you have a sister, you know they’re built-in best friends. From running around the playground and engaging in mischievous hijinks to tackling life’s challenges as you get older, having a sister is a special experience. So when her birthday rolls around, you want to say “Happy birthday, sister” in a way that lets her know how important she is to you.

If you’re not sure what to say in your sister’s birthday card, don’t stress. We’ve got you covered with this list of birthday wishes. From funny and punny to sentimental and sweet, there’s something for every personality. Plus, we’ve picked out a few of our favorite birthday cards you can use along with fun birthday celebration ideas.

The Best Birthday Wishes to Say “Happy Birthday, Sister”

Whether you’re sending birthday greetings to your sister, sister-in-law, or a sister-like figure, you want to find the right words. Try these funny birthday wishes, sentimental messages, and unique ways to celebrate your sister on her special day. 

Here are a few ideas: 

• You’re my favorite sister — well, you’re also the only one! I hope you have the most wonderful birthday.
• To the best sister on the planet: I love you and hope you have the best birthday ever.
• HBD, sis! Thanks for being my partner in crime, always backing me up, and being my biggest supporter. Hope you have a fabulous day filled with cake and fun.
• Happy birthday, big sister! As the elder sister, you’ve always been really old in my eyes, and now you’re even older. Hope this year brings you wisdom ‘cause you could really use it. Love you! 
• You’re such a wonderful sister. I hope your birthday is as amazing as you are and the day is filled with all of your favorite things: cake, presents, and me!
• Happy birthday to my sweet sister! I hope the new year brings you joy and adventure. 
• Happy birthday to my beautiful sister. May God grant you good health, prosperity, and happiness. 
• Dear sister: I hope you stuff your face with birthday cake today and you get an unreal amount of presents. You deserve to feel extra special on this big day. Thanks for making every day so memorable.
• I always wanted an older sister. While you may not be my blood, you sure are the sister of my dreams. Thanks for being my confidant, role model, and biggest cheerleader. I couldn’t have asked for a better sister-in-law. I hope your day today is extra special.
• To my younger sister: I know I’ve always been the coolest sister, but I hope today you get to experience just a fraction of how cool I am. Just kidding! I hope you have the most epic day. Thanks for years of sisterhood and for being the best sister imaginable.
• The greatest gift our parents gave me was a little sister. Thanks for letting me guide you through life, teaching me a few things, and always being a wonderful person. Happy birthday, sis!
• Happy birthday, sissy! We may not be technically related, but you’re my BFF and more of a sister than any relative could ever be. Love you!
• Dearest sister, have a wonderful day eating birthday cake and blowing out candles. Here’s to hoping all of your wishes come true.
• Wishing the happiest birthday to my lovely sister. You’re my favorite person on the planet and I hope you have the most amazing day.
• My amazing sister! Wishing you a very happy birthday and a year full of memories, laughter, and fun.
• Sending big hugs and birthday wishes to my beautiful sister. Thanks for being an awesome sister, even if I didn’t appreciate you when we were younger. Today, you’re my go-to for all of life’s conundrums and fun moments. Happy birthday!
• Wishing an amazing birthday to an amazing person. Happy birthday, sis!

Birthday Quotes to Say “Happy Birthday, Sister”

Writing heartfelt birthday wishes doesn’t mean you have to reinvent the wheel. Consider saying “Happy birthday, sister” with famous quotes to express your sentiments.

Here are a few sweet birthday quotes for inspiration:

• “Having a sister is like having a best friend you can’t get rid of. You know whatever you do, they’ll still be there.” — Amy Li
• “A sister is a gift to the heart, a friend to the spirit, a golden thread to the meaning of life.” — Isadora James
• “Sisters are friends we have for a lifetime.” — Catherine Pulsifer
• “God sent me an angel when he gave me you as a sister.” — Catherine Pulsifer
• “You’re not my best friend. You’re my sister, and that’s more.” — Jenny Han

Ways to Celebrate Your Sister on Her Birthday

Want to do more than just write your sister a birthday card? Consider spending time together to show her how special she is. 

Surprise Her with a Party

One way to make your sister’s birthday memorable is to throw her a surprise birthday party. Invite friends, family, and coworkers and be sure to send out surprise party invitations. Rent out one of her favorite venues or invite everyone to celebrate at your place. You could even host a surprise wine tasting party featuring some of her favorite vinos. 

Plan a Special Outing

Another great way to celebrate your sister’s birthday is to plan a special outing. While you can take her on a weekend vacay, you can also do something more budget-friendly. Enjoy a staycation at a local hotel, take a short road trip, go e-biking through the park, treat her to a spa day, or plan an aesthetic picnic if she loves snapping pics for social media. Another can’t-miss idea: relive your childhood by visiting your favorite theme park and indulging in all your favorite snacks as kids.

Give a Thoughtful Gift

If you don’t have a lot of time to spend together this year, consider getting your sister a special gift that suits her personality and preferences. Treat her to concert tickets, a gym class, or a gift card to a restaurant she’s been eager to try. When you send an online birthday card from Greenvelope, you can also send a gift card!

Design a Custom Birthday Card for Your Sis

We’ve picked out a few of our favorite birthday cards to send your sister happy birthday wishes. With Greenvelope, you can customize any card. Change up the color scheme and font or add design elements to make it truly unique — just like your beloved sister. 

1. Happy Bday Frame Card

Design: Signature Greeenvelope

This sister birthday card features a photo slot where you can add your favorite snap of the two of you. It’s perfect for short birthday wishes and comes in several colorways so you can pick one that matches her favorite hue.

2. Birthday Sweets Card

Design: Signature Greenvelope

This sweet card is a fun way to say “Happy birthday, sister!” Featuring a giant, colorful cupcake, it works perfectly with lively and fun wording ideas. Customize it by filling out the supported backside with birthday wishes and adding fun elements like music to complete the birthday card.

3. Things Are Bananas Card

Design: Signature Greenvelope

Go all-out with your birthday wishes using this banana-centric card. It’s colorful, fun, and silly, making it ideal for a fun-loving sister.

4. Getting Older Card

Design: Signature Greenvelope

Celebrate the joys and memories of your youth with your sister with this cheeky card. Customize the card by choosing a color scheme and add birthday wishes on the backside. Your sister is sure to smile when she opens this festive card. 

5. Trendy Type Card

Design: Signature Greenvelope

Send your sister this trendy birthday card featuring a picture of the two of you having a great time. The metallic foil details add a hint of glam for a fabulous sister.

Celebrate Your Sister in Style

Honor your sister by sharing birthday messages from the heart. Add a few silly words to get her laughing or keep things short and sweet for a sentimental greeting. Whatever words you choose, she’s sure to appreciate you saying “Happy birthday, sister.”

Still want more? Browse our collection of birthday cards and birthday invitations to celebrate this special moment. After all, your sis deserves the best!