Age on a Specific Date
Age on any date
Enter a birth date and a date of interest to see the exact age in years, months and days on that date, plus the days lived and the next birthday. This is the check most forms need: age on the first day of school, on a deadline, on a race day or on a retirement date. Today is Sunday, October 4, 2026.
How age is counted
Age is counted in completed years, so each anniversary of the birth date adds one year. Months are whole months since the last birthday and days are the days since the last monthly anniversary. If the birth date is February 29, the birthday in a common year is taken as February 28, although some places treat March 1 as the legal date.
Age today versus age on a date
Today's age answers a different question from the age on a fixed date. A child who is 4 years and 11 months old today may be 5 on the cut-off date, and an adult 64 today may be 65 on the date a benefit begins. Use this calculator whenever a rule names a specific date.
Frequently asked questions
How do I find my age on a specific date?
Enter your birth date and the date of interest.
Does it show months and days?
Yes.
Does it count leap years?
Yes.
How are February 29 birthdays handled?
In common years the birthday is taken as February 28.
Can I use a future date?
Yes, it gives the projected age.
Can the date be before the birth date?
No.
How many days old am I on that date?
The result page shows it.
What weekday was I born?
The result page shows it.