Decode what you share
with everyone born
on your exact date
BirthdayDNA maps traits, patterns and statistical similarities across people who entered the world on the same day as you — and sends you a personalized similarity report every year.
- 01 Enter your details & birth date
- 02 Verify your email — your unique Genome ID is minted
- 03 Complete your trait profile and receive your yearly report
Join the sequence
FREE · NO REAL DNA INVOLVED · DELETE ANYTIME
🧬 Live Network Telemetry
// ABOUT THE PROJECT
One date. Thousands of profiles. Shared patterns.
BirthdayDNA investigates whether people born on the same day and year show meaningful similarities — in physical traits, characteristics and distribution. Every new member sharpens the statistics for their birth-date cohort.
- Free personalized yearly similarity reports
- Global trait comparisons across your birth-date cohort
- Anonymized, statistics-only analysis — no data sold, ever
// WHY IT MATTERS
Why you should join
BirthdayDNA only works at scale: every single profile makes the picture sharper for thousands of people who share your date. By joining, you are not just getting a report — you are helping build a one-of-a-kind open dataset.
Contribute to real research
Your anonymized traits feed statistical studies on human similarity that no single lab could assemble alone.
Meet your birth-date cohort
Discover how many people worldwide share your exact birth date — and what you statistically have in common with them.
A report that grows every year
As the network grows, your yearly report gets richer and more accurate. Early members watch their cohort evolve from the start.
Privacy by design
Analyses are anonymous and statistical. Your data is never sold, and you can delete it anytime with your Genome ID.
// FREQUENTLY ASKED
How does it work?
We aggregate anonymized data from members who share your birth date and surface trends in traits and characteristics. Your report shows how you compare to your cohort and to global averages.
Is this a real DNA test?
What does it cost?
Are photos required?
Can I delete my data?
// SUPPORTERS
Partners powering the network
BirthdayDNA runs on research institutes, technology partners and volunteers worldwide — keeping the experience free, private and global.
- Ethical science foundations
- Technology sponsors
- Volunteer translators
// JOIN THE MISSION
Help us build the world's largest birth-date dataset
Your support — big or small — fuels server costs, outreach and new analysis features. Get early access to new reports and exclusive community invites.