Workday Calculator

This tool performs two date operations treating only Saturday (getDay() === 6) and Sunday (getDay() === 0) as non-working days. In 'between' mode it counts business days, total calendar days, weekend days, and whole weeks between two dates. In 'add' mode it adds or subtracts a number of business days from a start date and returns the target date. Public holidays are not recognized.

1. Choose Calculation Type: 'Days between two dates' or 'Add/subtract working days'. 2. Set the Start Date (required). 3. In between mode, set the End Date. In add mode, set Days to add and pick Add or Subtract. 4. Click Calculate. Missing or invalid dates show an error toast; if end is on or before start in between mode, all results return 0.

Between mode: iterates day-by-day from start (exclusive) to end (exclusive), incrementing businessDays when the day is not a weekend; totalDays = round((end - start) / 86400000); weekendDays = totalDays - businessDays; weeks = floor(totalDays / 7). Add mode: walks calendar days from start in the chosen direction, counting a day toward the target only when it is a weekday, and also tallying weekendDaysPassed, until the requested number of weekday steps is met.