Most people know their birthday but not the day of the week they arrived. Were you born on a Monday, a Friday, a Sunday? It's a small fact that somehow feels meaningful once you know it.
The old English nursery rhyme "Monday's Child" has been around since at least the 1830s, assigning personality traits to each birth day. While not science, it's a charming piece of folk wisdom that billions of people still recite:
Beyond folk tradition, each weekday is named after a celestial body or Norse god — Monday (Moon), Tuesday (Tyr), Wednesday (Woden/Mercury), Thursday (Thor/Jupiter), Friday (Frigg/Venus), Saturday (Saturn), Sunday (Sun).
Enter your birthdate in the calculator above to instantly find out! It will show you the exact day of the week, fun facts about it, and how many of that day you've lived through.
Statistically, births are slightly less common on weekends (many planned inductions and C-sections happen on weekdays). But every day of the week sees plenty of births — none is truly rare.
Divide your total days alive by 7. A 30-year-old has lived approximately 1,565 of each weekday — so about 1,565 Fridays. The calculator shows your exact count for your birth day.
Each day has planetary associations: Monday (Moon — intuition), Tuesday (Mars — energy), Wednesday (Mercury — communication), Thursday (Jupiter — luck/expansion), Friday (Venus — beauty/love), Saturday (Saturn — discipline), Sunday (Sun — vitality). The calculator shows your day's fun facts!