Date and time tools
Working Days Calculator
Count working days between two dates with Monday-to-Friday weeks locally in your browser.
Enter a start date and an end date to count working days. Dates are treated as UTC calendar days, so time zones do not change the result. Public holidays are not subtracted. Calculations run locally in your browser; your dates are not uploaded or stored.
Count weekdays without timezone surprises.
Enter a start date and an end date to count Monday-to-Friday working days, with optional start, end, and Saturday handling. Dates are treated as UTC calendar days, so daylight-saving transitions do not change the result. Public holidays are not subtracted. Everything runs locally in your browser, so your dates are not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
How does the working days calculator work?
Enter a start date and an end date as YYYY-MM-DD. The calculator walks each UTC calendar day in the selected range and counts Monday through Friday as working days, with an option to count Saturdays as working days too. It also reports the total calendar days and weekend days in the range.
Can I include or exclude the start and end dates?
Yes. Both endpoint dates are included by default. Uncheck either option to start counting after the start date or stop counting before the end date. When both endpoints are excluded and the range has no remaining days, the result is zero working days.
Do public holidays or time zones affect the result?
No. Public holidays are not subtracted, so subtract them separately when they matter for your schedule. Both dates are treated as UTC calendar days, so daylight-saving transitions and local time zones do not change the result.
Do my dates stay private?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the dates you enter.