Workdays Calculator
Calculate the number of business days between two dates, automatically excluding weekends (Saturday/Sunday) and custom holidays.
Date Range
Exclude Holidays (Optional)
Enter one date per line in YYYY-MM-DD format.
Precision in Project Scheduling
The **Workdays Calculator** provides the crucial metric of business days, which is the standard unit of time used in project management, finance, and legal contracts. By automatically excluding weekends and allowing for custom public holidays, it gives users an accurate estimate of effective working time between two dates.
How Workdays are Calculated
The calculation involves iterating through every day in the specified range and applying two main filters:
- **Weekend Filter:** Days where the day of the week is Sunday (0) or Saturday (6) are excluded.
- **Holiday Filter:** The script checks if the current date matches any date listed in the custom holidays list. This list is converted into an efficient data structure (a JavaScript **Set**) for fast lookup.
Key Applications:
- **Delivery Deadlines:** Calculating the final delivery date for a service contract that specifies "15 business days."
- **Financial Transactions:** Determining the settlement date for financial instruments which operate only on business days.
- **HR Planning:** Measuring time-off duration relative to company working hours.