Multibirthday

🎂 When do you share a birthday? Multibirthday finds the magical days when the sum of everyone's ages reaches a round number. Add up the ages of you and your loved ones – whenever the total lands on a round number (40, 50, 100 …), it's Multibirthday. A brand-new reason to celebrate that nobody else knows about. ✨ THE IDEA Two people have two Multibirthdays a year, three people have three, and so on. The more of you there are, the more often you celebrate together. Separate birthdays become one shared event. 🎉 FEATURES • Calculate shared birthdays for up to 5 people • See your next Multibirthdays at a glance – with countdowns • Reminders so you never miss a day 🔔 • Presets for couples, family, friends & colleagues • Save as many groups as you like • Share your Multibirthday with a link • Celebrity examples to try instantly ⏱️ HOW IT WORKS 1. Enter names and birthdays 2. Tap "Calculate" 3. Discover your next shared celebrations 💞 PERFECT FOR Couples and anniversaries, families, best friends, flatmates, teams and colleagues – for anyone who wants to share a special moment together. 🌟 TRY IT OUT Load celebrity couples like Beyoncé & Jay-Z, William & Kate or the Obamas with one tap and see when they celebrate their next Multibirthday. 🌍 AVAILABLE IN 20 LANGUAGES English, German, Spanish, French, Italian, Portuguese, Dutch, Polish, Turkish, Arabic, Hindi, Chinese (Simplified & Traditional), Japanese, Korean, Indonesian, Vietnamese, Thai and more. ❤️ Completely free – no ads, no sign-up, no account needed. Download Multibirthday and find out when you'll next celebrate together!