Business Days Calculator
Calculate working days between dates or add business days to a date
Result
📅 Quick Answer
Adding 10 business days to Thu, Jan 1, 2026 gives you Thursday, January 15, 2026. This spans 14 calendar days total.
Dr. Snezana Lawrence
Mathematical Historian
15+ years experience
PhD from Yale University. Published mathematical historian ensuring precision in all calculations.
Education
PhD in Mathematical History - Yale University
📑 Table of Contents
📆 What are Business Days?
Business days (also called working days or weekdays) are the days when most businesses and government offices are open. In the US and most Western countries, this means:
Business Days
- • Monday
- • Tuesday
- • Wednesday
- • Thursday
- • Friday
Non-Business Days
- • Saturday (Weekend)
- • Sunday (Weekend)
- • Federal Holidays
- • Company-specific holidays
🇺🇸 US Federal Holidays (2024-2025)
2024
- Jan 1 - New Year's Day
- Jan 15 - MLK Jr. Day
- Feb 19 - Presidents' Day
- May 27 - Memorial Day
- Jun 19 - Juneteenth
- Jul 4 - Independence Day
- Sep 2 - Labor Day
- Oct 14 - Columbus Day
- Nov 11 - Veterans Day
- Nov 28 - Thanksgiving
- Dec 25 - Christmas
2025
- Jan 1 - New Year's Day
- Jan 20 - MLK Jr. Day
- Feb 17 - Presidents' Day
- May 26 - Memorial Day
- Jun 19 - Juneteenth
- Jul 4 - Independence Day
- Sep 1 - Labor Day
- Oct 13 - Columbus Day
- Nov 11 - Veterans Day
- Nov 27 - Thanksgiving
- Dec 25 - Christmas
💼 Common Use Cases
Shipping & Delivery
Calculate delivery dates for "ships in X business days"
Project Planning
Estimate project timelines and deadlines
Legal & Contracts
Calculate response deadlines and filing dates
HR & Payroll
Calculate work days for timesheets and PTO
❓ Frequently Asked Questions
What are business days?
Business days are Monday through Friday, excluding weekends and public holidays. Most businesses operate on these days.
How do I calculate business days between two dates?
Count the number of weekdays (Monday-Friday) between the two dates, excluding any public holidays. Our calculator does this automatically.
Are holidays included in business days?
No, public holidays are typically excluded from business days. Our calculator excludes US federal holidays by default.
How many business days are in a week?
A typical week has 5 business days (Monday through Friday), unless a holiday falls during the week.
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Dr. Snezana Lawrence
Mathematical Historian | PhD from Yale
Dr. Lawrence is a published mathematical historian with a PhD from Yale University. She ensures mathematical precision and accuracy in all our calculations, conversions, and academic score calculators. Her expertise spans computational mathematics and educational assessment.
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