What Day Was I Born? Find Your Birth Day

Do you know “what day was I born”? Not the date — the day of the week. A date of birth calculator reveals it instantly, and confirms “what year was I born” at the same time.

Why the weekday is fun to know

Your birth weekday is a small, personal detail many people never learn. The old nursery rhyme even gives each day a character: “Monday’s child is fair of face, Tuesday’s child is full of grace…” Whether or not you believe it, it’s a charming thing to discover.

How it’s calculated

Working out a weekday by hand uses clever methods like Zeller’s congruence or the “Doomsday” rule, which account for month lengths and leap years. A calculator does all of that instantly — you just enter your date of birth and it returns the exact day, from Monday through Sunday.

Confirming your birth year and date

The same result also spells out your full birth date in plain language, so there’s no ambiguity about the day, month or year you were born.

Try it for any date

It’s not limited to your own birthday — enter any historical date to find out which weekday it fell on.

Reveal your birth day

Enter your date of birth to see the exact weekday you were born.