How to use this birthday calculator
- Enter your birth date (month, day, year).
- Click Calculate.
- Review weekday born, star sign, Chinese zodiac, birthstone, next birthday date, and how long you have lived.
For full age in years and months on any date, use the Age Calculator. To compare two birthdays, try the Age Difference Calculator.
What does this birthday calculator show?
Many people search for calendar facts tied to their birth date — not just “how old am I?” This tool highlights the details people look up most often:
- Weekday born — Monday, Tuesday, etc.
- Star sign — Western zodiac sun sign from your birth month and day
- Chinese zodiac — animal sign from your birth year
- Birthstone — traditional stone for your birth month
- Next birthday — date and days remaining
- Time lived — months, weeks, and days so far
Leap-day birthdays
If you were born on 29 February, the next birthday countdown uses 28 February in non-leap years when the 29th does not exist — a common convention for leap-day births.
Star sign vs Chinese zodiac
Western star signs depend on month and day within the solar year. Chinese zodiac animals follow the lunar calendar and typically change around late January or February — this calculator uses birth year for the animal sign, matching common quick-reference tools.
Examples and use cases
Worked example
Birth date 15 July 1995 (a Saturday):
- Star sign: Cancer (June 21 – July 22)
- Chinese zodiac: Pig (1995)
- Birthstone: Ruby
Real-world use cases
- Party planning: Someone checks how many days until a milestone birthday to send invitations and book a venue.
- Genealogy curiosity: A family historian notes the weekday and zodiac for each ancestor’s birth date in a shared tree.
- Gift ideas: A friend looks up birthstone and star sign before choosing jewelry or a themed birthday card.
Related tools
- Age Calculator — exact age on any date
- Generations Calculator — cohort by birth year
- Age Difference Calculator — gap between two people