Milestone Age Calculator

When do you turn 16, 18, 21, 30, 50 or 65? Pick your birth date and see every milestone date on your calendar.

Your date of birth

Select your date of birth to see every milestone date

Every milestone, dated

Milestone ages gate real things: driving, voting, drinking, retirement discounts. The calculator lists the exact calendar date you reach each milestone age — 16, 18, 21, 30, 40, 50, 65 and 100 — computed from your date of birth with leap years handled.

The next upcoming milestone is highlighted, and past milestones show their weekday so you can reconstruct the day you came of age.

Leap-day birthdays and milestones

Born on 29 February? Your milestone dates follow the same convention as the rest of this site: the anniversary rolls to 1 March in common years. You also get the fun claim of reaching 18 on your "4th birthday" — the calculator's day count makes that precise.

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Frequently asked questions

＋When do I turn 18?

Pick your birth date and the milestone list shows the exact date of your 18th birthday — the day you legally become an adult in most countries.

＋When do I turn 65 (retirement age)?

The milestone list includes 65 along with 16, 18, 21, 30, 40, 50 and 100, each with its exact calendar date and weekday.

＋How are milestone dates calculated?

By adding the milestone age to your birth year and keeping your birth month and day — the same complete-years convention every legal system uses. Leap-day birthdays roll to 1 March in common years.