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Age reference

Turning 40 in 2026

If you are turning 40 in 2026, your birth year is 1986.

The quick answer

Someone turning 40 in 2026 was born in 1986. Before their birthday in 2026, they are 39. On and after their birthday, they are 40.

This page is a fast reference for milestone birthdays. Exact dates still depend on the person’s birth month and day, so use the milestone calculator when the exact date matters.

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