Calculate Business Days
Add Business Days to Date
Understanding Business Days
Business days are weekdays (Monday through Friday), excluding public holidays. They're the standard measure for commercial and legal timelines where weekends don't count as working time. Our business days calculator helps you determine the number of working days between any two dates, or find what date falls a specific number of business days from a starting point.
Understanding business days vs. calendar days is crucial for shipping estimates, legal deadlines, financial transactions, and project planning. When a contract says "5 business days," that typically spans 7 calendar days (a full week minus the weekend).
What Counts as a Business Day?
The definition of a business day can vary, but generally includes:
- Standard weekdays: Monday, Tuesday, Wednesday, Thursday, Friday
- Excluded weekends: Saturday and Sunday are never business days
- Federal holidays: Banks and government offices observe these (varies by country)
- Business hours: Typically 9 AM to 5 PM, but some transactions require completion by cutoff times
💼 Quick Conversion
5 business days = 7 calendar days (1 week) | 10 business days = 14 calendar days (2 weeks) | 20 business days ≈ 28 calendar days (4 weeks, or roughly 1 month)
Handling Holidays
Public holidays complicate business day calculations. Common US federal holidays include:
- New Year's Day (January 1)
- Martin Luther King Jr. Day (3rd Monday of January)
- Presidents' Day (3rd Monday of February)
- Memorial Day (Last Monday of May)
- Independence Day (July 4)
- Labor Day (1st Monday of September)
- Columbus Day (2nd Monday of October)
- Veterans Day (November 11)
- Thanksgiving (4th Thursday of November)
- Christmas Day (December 25)
International Business Day Variations
Business days differ significantly around the world:
- Middle East: Many countries use Sunday-Thursday as the work week, with Friday-Saturday as the weekend
- Israel: Works Sunday-Thursday or Sunday-Friday (half day)
- UAE: Recently switched to Monday-Friday for government, but some private sectors still use Sunday-Thursday
- Europe: Similar to US, but with different national holidays
- Asia: Saturday is often a half-day or full work day in some countries
SLA and Service Level Calculations
Service Level Agreements (SLAs) often specify response times in business hours or days:
- Critical issues: Often 4 business hours response time
- High priority: 1 business day (8 working hours)
- Standard requests: 2-3 business days
- Low priority: 5 business days or more
- Business hours: Typically 9 AM - 5 PM in the customer's time zone
Shipping Estimates
Shipping companies use business days because most don't deliver on weekends:
- Next business day: Order Friday morning, receive Monday
- 2 business days: Order Thursday, receive Monday
- 3-5 business days: Standard ground shipping estimate
- 7-10 business days: Economy or international shipping
- Saturday delivery: Available as a premium option from some carriers
Legal and Financial Business Days
Courts and banks have specific business day rules:
- Court filings: Must be submitted by end of business day (often 5 PM)
- ACH transfers: Processed only on banking business days
- Wire transfers: Same-day if initiated before cutoff (usually 2-4 PM)
- Stock market: NYSE and NASDAQ closed on weekends and market holidays
- Real estate closings: Typically scheduled on business days
Common Business Day Calculations
- Business days per week: 5 days
- Business days per month: 20-23 days (average 21.7)
- Business days per year: 250-252 days (excluding 10-11 holidays)
- Working hours per year: 2,000-2,080 hours (at 8 hours/day)
Did You Know?
The five-day work week became standard in the US in 1940, but Henry Ford was one of the first to adopt it in 1926, believing it would increase productivity!