Free Random Birthday Generator – Generate Random Birth Dates Online
Generate random birthdays with age calculation and zodiac sign information. Choose generation presets for specific age groups. Perfect for character creation and testing. 100% free.
What Is This Tool?
The Random Birthday Generator creates realistic birth dates within your specified year range. Each result includes the full date, calculated age, and zodiac sign.
Features
Year Range Selection
Specify minimum and maximum years for generated birthdays.
Generation Presets
Quick presets for popular generations:
- Gen Z (1997-2012)
- Millennials (1981-1996)
- Gen X (1965-1980)
- Baby Boomers (1946-1964)
Age Calculation
Automatically calculates current age based on today's date.
Zodiac Signs
Each birthday includes the corresponding astrological sign.
How to Use
- Select year range or choose a generation preset
- Choose count (1, 3, 5, or 10 birthdays)
- Click Generate for random results
- Copy results for use elsewhere
Generation Information
Gen Z (1997-2012)
The first digital natives. Currently ages 12-27.
Millennials (1981-1996)
The social media pioneers. Currently ages 28-43.
Gen X (1965-1980)
The "MTV Generation". Currently ages 44-59.
Baby Boomers (1946-1964)
Post-WWII generation. Currently ages 60-78.
Silent Generation (1928-1945)
Pre-war generation. Currently ages 79-96.
Zodiac Sign Reference
| Sign | Dates | Symbol |
|---|---|---|
| Capricorn | Dec 22 - Jan 19 | ♑ |
| Aquarius | Jan 20 - Feb 18 | ♒ |
| Pisces | Feb 19 - Mar 20 | ♓ |
| Aries | Mar 21 - Apr 19 | ♈ |
| Taurus | Apr 20 - May 20 | ♉ |
| Gemini | May 21 - Jun 20 | ♊ |
| Cancer | Jun 21 - Jul 22 | ♋ |
| Leo | Jul 23 - Aug 22 | ♌ |
| Virgo | Aug 23 - Sep 22 | ♍ |
| Libra | Sep 23 - Oct 22 | ♎ |
| Scorpio | Oct 23 - Nov 21 | ♏ |
| Sagittarius | Nov 22 - Dec 21 | ♐ |
Use Cases
Character Development
Writers and game developers need realistic birthdays for character profiles.
Software Testing
QA testers need random dates within specific ranges for form testing.
Gaming & Role-Playing
Tabletop RPG players creating character backstories.
Demographic Simulation
Research requiring age-diverse sample data.
Educational Purposes
Teaching date formats, age calculations, or astrology.
Birthday Statistics
Most Common Birth Months
September tends to have the most birthdays (9 months after the holidays).
Leap Year Birthdays
February 29 occurs only 1 in 1,461 days.
Shared Birthdays
In a group of 23 people, there's a 50% chance two share a birthday.
Age Calculation
The age is calculated using:
- Current year minus birth year
- Adjusted if birthday hasn't occurred yet this year
Example
- Birthday: July 15, 1990
- Today: January 22, 2026
- Age: 35 (turns 36 in July)
Frequently Asked Questions
Are the birthdays truly random?
Yes, each component (year, month, day) is randomly generated within valid ranges.
Does it account for leap years?
Yes, February 29 can be generated for leap years.
How is age calculated?
Based on whether the birthday has occurred in the current year.
Can I generate adult-only ages?
Yes, set the year range to 18+ years ago (e.g., 1950-2006).
Are timezone differences considered?
The tool uses your local timezone for age calculations.
Related Uses
Fake Identity Generation (Legal Uses)
- Character creation
- Privacy protection (test accounts)
- Data anonymization
Age Verification Testing
Test age gates and verification systems with various birth dates.
Demographic Research
Generate sample populations with realistic age distributions.
Tips
- Use presets for common age groups
- Narrow ranges for specific character ages
- Generate multiple for best selection
- Copy with zodiac for complete profiles
Click Generate above to create random birthdays with age and zodiac information.