Find the right birthday page
The site is deliberately focused on birthday rarity and birthday calculators, with a small set of supporting pages instead of broad birthday-content categories.
Start with the main birthday rarity calculator to check your own date, or use the sections below to compare rankings, find celebrity matches, or try one of the birthday calculators.
Birthday rarity
- Birthday Rarity Calculator Check how rare or common your birthday is, with a rarity score and rank among 366 dates.
- Rarest Birthdays Compare the dates at the rare end of the historical U.S. birthday ranking.
- Most Common Birthdays Compare the dates at the common end of the historical U.S. birthday ranking.
- Celebrity Birthday Matches Find famous people who share your birthday and compare the rarity of their dates.
- Birthday Rarity Methodology See how historical U.S. birth records are used to calculate birthday rarity ranks and scores.
Birthday calculators
- Half Birthday Calculator Find the date halfway between one birthday and the next.
- Golden Birthday Calculator Find the birthday when your age matches the day of the month you were born.
- Crown Birthday Calculator Check the playful crown-birthday number pattern used on this site.
- Diamond Birthday Calculator Find the birthday when your age matches the final two digits of your birth year.
- Platinum Birthday Calculator Try the playful reversed-number platinum birthday milestone.
- Emerald Birthday Calculator Find the childhood birthday when your age matches your birth month number.
- Birthday Countdown Calculator Count the days until your next birthday and see the age you will turn.
- Exact Age Calculator Calculate your exact age in years, months, days, and total days lived.
- Birthday Day of the Week Calculator Find the weekday you were born on and the weekdays of upcoming birthdays.
- Milestone Birthday Calculator See the dates of major age milestones from childhood through age 100.
- Leap Birthday Calculator Count exact February 29 birthday anniversaries and find your next Leap Day birthday.
- Birthday Probability Calculator Calculate the chance that at least two people in a group share a birthday.
- Birthday Rarity Comparison Calculator Compare two birthday dates using the same rarity ranking as the main calculator.
About and help
- About Learn why How Rare Is My Birthday focuses on birthday rarity and birthday calculators.
- Contact Send a correction, question, or suggestion about the birthday rarity site.
- Privacy Policy Read how analytics, advertising, cookies, and contact messages are handled.
- HTML Sitemap Browse the birthday rarity pages, celebrity matches, calculators, and site information.