If you were born on 29 February, you can celebrate on 28 February or 1 March in years that are not leap years. Both are common, and there is no single rule for parties. For legal age, some countries treat your birthday as 1 March in non-leap years and others as 28 February. Your actual 29 February birthday comes round once every four years, next in 2028.
28 February or 1 March?
Families usually pick one and stick to it:
- 28 February keeps the birthday in the month you were born.
- 1 March means the celebration never comes before the moment you actually turn a year older: in a non-leap year, the day after 28 February is 1 March.
Some leaplings celebrate on both days, and many make a bigger celebration of the real 29 February when it comes round.
Legal age for people born on 29 February
When it matters for things like a driving licence or the age of majority, the date is set by local law:
| Place | Birthday in a non-leap year | Source |
|---|---|---|
| United Kingdom | 1 March | timeanddate.com |
| Hong Kong | 1 March (Age of Majority Ordinance, section 5) | Wikipedia: Legal age |
| Australia | 1 March (court ruling on adulthood) | Wikipedia: Legal age |
| New Zealand | 28 February | timeanddate.com |
Rules can differ by country, state and purpose, so check with the official body involved if a date matters for a licence, a contract or a benefit. This page is general information, not legal advice.
Leap birthday calculator
The age shown assumes your birthday counts from 28 February in non-leap years; it may be a day earlier than the legal date where 1 March applies.
How rare is a 29 February birthday?
Every four years contain 1,461 days, and 29 February is one of them, so the chance of being born on it is roughly 1 in 1,461. That is an estimate: births are not spread perfectly evenly through the year.
The leap year rule
A year is a leap year if it can be divided by 4, except century years, which must also be divisible by 400:
- 2000 was a leap year (divisible by 400).
- 2100 will not be a leap year (divisible by 100 but not 400).
- Upcoming 29 Februaries: 2028, 2032, 2036, 2040.
Someone born on 29 February 2096 will therefore wait eight years, until 2104, for their first real birthday.
Your half birthday happens every year
Six months after 29 February is 29 August, a date that exists every year. That makes the half birthday the one date a leap-year baby can celebrate on time, every year, which is why many families mark it. Find any half birthday with the half birthday calculator, or see the chart for every date.
Ideas for a leap year birthday
- “Fun” age parties: a 20-year-old has had only five real birthdays, so a “5th birthday” theme with balloons and games is a classic.
- Frog themes: leaping frogs are a popular leap-day motif for cakes and invitations.
- A two-day celebration on 28 February and 1 March in non-leap years.
- A bigger party every four years on the real 29 February.
- Celebrate the half birthday on 29 August as a yearly extra. More ideas in how to celebrate a half birthday.
Leap year birthday questions
When do you celebrate a 29 February birthday in a normal year?
Most people choose 28 February or 1 March. Either is fine for a party; for legal purposes the date depends on local law.
How old is someone born on 29 February 2000?
They turn 28 in 2028 and have had seven real 29 February birthdays by then (2004, 2008, 2012, 2016, 2020, 2024 and 2028).
Is 29 February a real birthday?
Yes. It appears on birth certificates and official records like any other date. It simply only occurs in leap years.
When is the half birthday of someone born on 29 February?
29 August, every year.
Related guides
- How we calculate half birthdays
- Age calculator
- Half birthday chart for every date
- Quarter birthday calculator
Last updated: 11 November 2026.