How Rare Is My Birthday?

How Rare Is Your Birthday?

Enter your birthday to see how rare your birthday is or how common your birthday is in the United States and Canada. See your birthday rarity score, plus your personalized birthday ranking and birthday profile, zodiac sign and celebrity birthday matches.

Check my birthday See the rarest birthdays
  • Rarity score out of 100
  • Rank among 366 dates
  • Six country models
Fun unicorn celebrating with children at a colourful birthday party.

Birthday rarity calculator

Let's find out how rare your birthday is!

Select your birthday and country. You will get a birthday rarity score, and a fun profile with your zodiac sign, birthstone, birth flower, weekday, next birthday, birthday countdown, and famous people born on the same date.

Your year validates the date and helps identify moving holidays. The rarity score itself is based on the month and day.

More birthday calculators

Find your birthday milestones

Discover the special dates and number patterns connected with your birthday.

Half birthdayFind the date halfway to your next birthday. Golden birthdayWhen your age matches your birth date. Crown birthdayMatch your day with your birth-year ending. Diamond birthdayFind a special age and birth-year match. Platinum birthdayTry the reverse-number milestone. Emerald birthdayWhen your age matches your birth month.

Explore birthday rarity

Start with the most useful birthday guides

See the dates at both ends of the calendar and learn how birthday patterns are compared.

Rarest birthdays

See which dates rank toward the rare end of the calendar and why Leap Day needs special treatment.

View rare birthdays

Most common birthdays

Explore the busier dates of the year and the seasonal patterns that can shape birthday frequency.

View common birthdays

Birthday statistics

Compare rare and common dates, monthly patterns, and the main results across all six country models.

Read birthday statistics

Across the six country models

The main birthday patterns are easy to compare

The exact percentages vary by country, but the current models share several broad patterns.

Rarest calendar date February 29 Appears only in leap years
Rarest recurring date January 1 Across the current models
Most common dates September 1 and August 31 Varies slightly by country
Monthly pattern August busiest December quietest

These are modeled comparisons, not official national birth totals. The birthday statistics page shows the full country and month tables.

Understanding your score

What makes a birthday rare?

Birthdays are not spread perfectly evenly across the calendar. Some seasons have more births than others, while major holidays and days affected by scheduling can have fewer. The calculator compares your date with the other calendar dates in the selected country model and converts that position into a birthday rarity score.

A higher score means the date appears toward the rarer end of the selected model. A lower score means it appears toward the busier end. The rank, percentage, and score all describe the same exact month-and-day comparison.

February 29 is also different from every recurring date because it only appears in leap years. Its calendar rarity and its birthday-frequency ranking are related ideas, but they are not exactly the same measurement.

Special birthday guides

Birthdays that already come with a story

Holiday and calendar-themed birthdays often feel especially memorable, whether or not they are the very rarest dates.

Leap Day birthdaysFebruary 29 birthdays and leap-year facts. Christmas birthdaysIdeas for making December 25 feel separate and special. New Year's Day birthdaysWhy January 1 stands out on the calendar. Halloween birthdaysCelebrate a memorable October 31 birthday. Valentine's Day birthdaysBirthday ideas for February 14.

Famous birthdays

See who shares an unusual date

Birthday wording

Find the right birthday message

More rarity calculators

Curious about more than birthdays?

Explore two related calculators created for names and eye colours.

How Rare Is My Name?Check first-name rarity in the United States and Canada. How Rare Is My Eye Color?Compare eye colours and learn which ones are less common.

Birthday rarity questions

Frequently asked questions

Is February 29 the rarest birthday?

Yes for calendar rarity: February 29 only appears in leap years. The ranking guides also show the rarest annually recurring date so Leap Day can be separated from dates that return every year.

What does a birthday rarity score mean?

The score shows where your month and day fall compared with the other dates in the selected country model. A score closer to 100 falls toward the rarer end.

Why does the calculator ask for my birth year?

The year validates dates such as February 29 and helps the page identify moving holidays that landed on your birthday. It does not change the main month-and-day rarity score.

Why are some birthdays more common?

Birth patterns can vary by season, holidays, scheduling practices, and country. That is why birthday-frequency estimates are not perfectly even across the year.