Day of Week Calculator Tool
Instantly calculate the day of the week for any date. Also shows Japanese era, holiday info, Chinese zodiac, zodiac sign, Rokuyo, monthly calendar, and yearly same-weekday list.
How to Use
Enter a Date
Enter the year, month, and day. The day options auto-adjust based on month and year. Use preset buttons for quick input (Today, Next Holiday, Valentine's Day, etc.).
View the Day and Related Info
The day of the week is instantly displayed in large text. Japanese era, holiday status, Chinese zodiac, zodiac sign, Rokuyo, and days difference are also shown.
Explore Calendar and Same-Weekday List
View the monthly calendar with holidays highlighted. Expand the yearly same-weekday list to see all dates sharing the same weekday.
Copy Results
Click "Copy Result" to copy date, weekday, Japanese era, zodiac, and more as formatted text to your clipboard.
About Day of Week Calculator
A web tool that instantly finds the day of the week for any date from year 1 to 9999. Shows Japanese era, holiday status, Chinese zodiac, zodiac sign, Rokuyo, monthly calendar with holidays, and yearly same-weekday list. All processing happens in your browser with no data sent to any server.
Features
- Instant Day CalculationThe day of the week appears instantly as you type. No button press needed.
- Rich Additional InfoJapanese era, holiday check, Chinese zodiac, zodiac sign, Rokuyo, and days difference - all in one view.
- Monthly CalendarAuto-generated mini calendar with holidays color-coded. Navigate between months with arrow buttons.
- Yearly Same-Weekday ListLists all dates in the year that fall on the same weekday, organized by month. Useful for scheduling.
Use Cases
- Find what day of the week your birthday was
- Check weekdays for upcoming events and holidays
- Research what day historical events occurred on
- Plan wedding or moving dates (Rokuyo check)
- Schedule recurring weekly events