What Day of the Week Was I Born?
Most people have no idea which day of the week they were born on. Enter your birthday below and find out instantly — along with the nursery rhyme verdict on what that supposedly means.
Days of the Week: Birth Statistics
Are birthdays evenly distributed across the week? Roughly — but not perfectly. In most countries, slightly fewer babies are born on weekends because elective C-sections and induced labours are scheduled on weekdays.
| Day | Relative birth frequency | Named after |
|---|---|---|
| Monday | Average | Moon (Luna) |
| Tuesday | Average | Tiw (Norse god of war) |
| Wednesday | Average | Woden / Odin |
| Thursday | Slightly above average | Thor |
| Friday | Above average | Frigg / Freya |
| Saturday | Below average | Saturn |
| Sunday | Lowest | Sun (Sol) |
Source: CDC birth data (US). The pattern holds across most Western countries with medicalised birth systems.
The Nursery Rhyme
The traditional English nursery rhyme "Monday's Child" assigns a character trait to each birth day. It dates to around 1838 and has no scientific basis — but it's been quoted ever since:
| Day | Traditional verse |
|---|---|
| Monday | "Fair of face" |
| Tuesday | "Full of grace" |
| Wednesday | "Full of woe" |
| Thursday | "Has far to go" |
| Friday | "Loving and giving" |
| Saturday | "Works hard for a living" |
| Sunday | "Bonny and blithe and good and gay" |
How Day-of-Week Is Calculated
Finding the day of the week for any historical date is a classic maths problem. The most common algorithm is Zeller's congruence (1882), which uses modular arithmetic on the day, month, and year to produce a number 0–6 mapping to a day of the week.
JavaScript's Date object handles this directly: new Date('1990-05-13').getDay() returns 0 (Sunday) through 6 (Saturday). The calculator above uses this method — it's accurate for any date from 1583 onwards (Gregorian calendar).
Get your full age breakdown
See your exact age in years, months, weeks, days, hours, minutes and seconds — with a live birthday countdown.
Open Age Calculator →