Rarest Birthdays
See why holidays and February 29 often feel rare. The guide keeps the tone fun while separating exact date math from estimated calendar patterns.
✦
The 20 Rarest Birthdays
Rank #366 is the rarest date in the site’s 366-day estimate. Select any birthday below to open its complete statistics page.
#1rarestFebruary 29Leap DayOccurs only in leap years, making it the clearest calendar rarity.#366of 366#2rarestDecember 25Christmas DayA major holiday when fewer deliveries are typically scheduled.#365of 366#3rarestJanuary 1New Year’s DayHoliday scheduling helps place this date near the rare end.#364of 366#4rarestDecember 24Christmas EveFalls inside one of the year’s busiest holiday periods.#363of 366#5rarestDecember 26Holiday WeekPart of the lower-frequency stretch immediately after Christmas.#362of 366#6rarestDecember 31New Year’s EveTravel, holidays, and scheduling all affect this date.#361of 366#7rarestJanuary 2Post-HolidayThe first days after New Year remain an unusually quiet birth period.#360of 366#8rarestJanuary 4Early JanuaryRanks inside the lower-frequency early-January stretch.#359of 366#9rarestJanuary 3Early JanuaryAnother date affected by the New Year holiday period.#358of 366#10rarestJanuary 5Early JanuaryRemains within the quieter opening week of the year.#357of 366#11rarestJanuary 6Early JanuaryFalls near the end of the low-frequency holiday stretch.#356of 366#12rarestJanuary 7Early JanuaryStill ranks among the rarest dates in the site estimate.#355of 366#13rarestNovember 27Thanksgiving PeriodOften overlaps Thanksgiving or its surrounding travel days.#354of 366#14rarestNovember 26Thanksgiving PeriodFrequently falls within the Thanksgiving holiday window.#353of 366#15rarestNovember 25Thanksgiving PeriodHoliday-week scheduling can reduce births on this date.#352of 366#16rarestNovember 28Thanksgiving PeriodOften lands during Thanksgiving weekend.#351of 366#17rarestNovember 29Thanksgiving PeriodPart of a lower-frequency late-November cluster.#350of 366#18rarestNovember 24Thanksgiving PeriodFrequently sits at the beginning of holiday travel week.#349of 366#19rarestJuly 4Independence DayA major U.S. holiday with fewer scheduled deliveries.#348of 366#20rarestDecember 27Holiday WeekFalls between Christmas and New Year’s Day.#347of 366
Top 5 Extremely rareTop 10 Very rareTop 20 Among the rarest 5.5%
How to Interpret the List
The ranking is an estimate rather than a universal birth registry. Exact positions can change with the country, years studied, population size, hospital scheduling practices, and treatment of leap-day births. The table is meant to provide a clear date-by-date comparison instead of only naming dates that seem unusual.
Use the How Rare Is My Birthday? calculator to check any month and day, or compare the other end of the calendar on the Most Common Birthdays page.
What Often Makes a Birthday Rare?
- It occurs on February 29 and therefore appears only in leap years.
- It falls on a major holiday when scheduled deliveries may be less common.
- It sits inside a year-end travel or holiday period.
- It falls within a lower-frequency seasonal stretch in the underlying estimate.