Find a specific birthday date
Enter a birth date and a milestone age from 0 to 200. The reference date lets the result show whether the milestone is ahead or behind you. This is useful for planning a personal anniversary.
How the result is calculated
The target year is the birth year plus the milestone age. The month and day stay the same, except that a 29 February anniversary uses your selected rule in non-leap years.
Worked example
A person born on 15 June 2000 reaches their 50th birthday on 15 June 2050. The number of days away changes with the reference date. Organisations may set their own age and eligibility rules.
Read our calculation methods and limits for date ranges, rounding and calendar conventions.