Multibirthday

Turn two birthdays into one celebration: Multibirthday finds the days when your ages add up to a round number. With countdowns and friendly reminders.

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!