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Random Birthday Generator

Create realistic random dates of birth for any age range, with age, weekday, zodiac sign and birthstone.

Generate birthdays

  1. February 10, 1961

    Age 65 · Born on a Friday · Aquarius

  2. May 5, 1974

    Age 52 · Born on a Sunday · Taurus

  3. September 18, 1963

    Age 63 · Born on a Wednesday · Virgo

  4. February 26, 1968

    Age 58 · Born on a Monday · Pisces

  5. May 14, 1970

    Age 56 · Born on a Thursday · Taurus

What people use random birthdays for

Fictional characters

Give every character in your story a birthday, a zodiac sign and the weekday they were born. Pair it with the Character Headcanon Generator to flesh them out.

Test data

Developers and testers use random dates to fill forms and check age validation at the edges of a range.

Classroom math

Students calculate ages, days between dates or the day of the week, then check their answers against the details line.

Party games

Hand out random birthdays and have players guess each other's zodiac sign or find their “birthday twin”.

These dates are fictional. Use them for fiction, testing and games, never to impersonate a real person or to get around an age check.

How the dates are generated

The generator turns your age range into a window of calendar days, starting the day after someone would turn one year older than the maximum age and ending on the day they turn the minimum age. It then picks a day uniformly at random. Every date in the window is equally likely (leap days included), and the age shown is always correct for today's date.

Date formats

FormatExampleCommon in
Month D, YYYYSeptember 30, 1994Writing, invitations
MM/DD/YYYY09/30/1994United States
DD/MM/YYYY30/09/1994UK, Europe and most of the world
YYYY-MM-DD1994-09-30ISO 8601, databases and code

Birthstones by month

MonthBirthstoneMonthBirthstone
JanuaryGarnetJulyRuby
FebruaryAmethystAugustPeridot
MarchAquamarineSeptemberSapphire
AprilDiamondOctoberOpal
MayEmeraldNovemberTopaz
JunePearlDecemberTurquoise

The list follows the traditional modern birthstones. Some months have alternatives (tourmaline for October, citrine for November, tanzanite for December).

Zodiac sign dates

Zodiac signs use the common Western (tropical) date ranges. Sources sometimes differ by a day at the edges of a sign.

SignDatesSignDates
AriesMar 21 – Apr 19LibraSep 23 – Oct 22
TaurusApr 20 – May 20ScorpioOct 23 – Nov 21
GeminiMay 21 – Jun 20SagittariusNov 22 – Dec 21
CancerJun 21 – Jul 22CapricornDec 22 – Jan 19
LeoJul 23 – Aug 22AquariusJan 20 – Feb 18
VirgoAug 23 – Sep 22PiscesFeb 19 – Mar 20

Frequently asked questions

How is the Chinese zodiac animal worked out?
The Chinese zodiac year starts at Lunar New Year, which falls between January 21 and February 20. For birthdays in that window the generator shows both possible animals, because the exact switch date changes every year.
Are these real people's birthdays?
No. Each date is calculated at random and doesn't belong to anyone.
Can I generate birthdays for children?
Yes. Set the minimum age to 0 and the maximum to, for example, 12. The range goes up to 110 years.
Why does the age differ from the year difference?
Age counts completed years. Someone born later in the year than today's date hasn't had their birthday yet, so they are one year younger than the simple difference between the years.

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