How to Count Business Days Between Two Dates
A business day is a normal working day — a weekday that is not a public holiday. Counting them between two dates means starting from the full span and removing the days no work happens, which is why a "10 business days" deadline is always longer on the calendar than ten days.
What counts as a business day
A business day (or working day) is Monday to Friday, excluding public holidays. Weekends and holidays are the days that get removed from the count. The distinction between these and ordinary calendar days is explained in business days vs calendar days — it is the source of most deadline confusion.
The counting method
To count business days between two dates: start with the total number of days in the range, subtract every Saturday and Sunday, then subtract any public holiday that falls on a weekday (holidays on a weekend are already excluded). What remains is the number of business days. The Working Days Calculator runs this for you, and Business Days Between Dates phrases the same count for a corporate context.
Adding business days to a date
Deadlines are often written as "within 10 business days" rather than a fixed date. To resolve one, step forward from the start date counting only weekdays and skipping holidays until you reach the required number. The Add Business Days Calculator lands on the exact date for you.
Holidays differ by country
Because public holidays vary by country and even by region, the same date range can hold different business-day counts in different places. For India-specific holidays, use the Working Days Calculator India; for a sense of the yearly total, see working days in a year.