Business Day Calculator

Select Dates to Exclude

Exclude Weekends (Sat, Sun)

Exclude Holidays

Business Days Between Dates

Start Date

End Date

Calculate Date After Business Days

Start Date

Number of Business Days

2025 Public Holiday Preview

Date	Day	Holiday
2025-01-01	Wed	New Year's Day
2025-01-28 ~ 01-30	Tue-Thu	Lunar New Year Holiday (Around lunar January 1)
2025-03-01	Sat	Independence Movement Day
2025-05-05	Mon	Children's Day
2025-05-05	Mon	Buddha's Birthday
2025-06-06	Fri	Memorial Day
2025-08-15	Fri	Liberation Day
2025-10-05 ~ 10-07	Sun-Tue	Chuseok Holiday (Around lunar August 15)
2025-10-09	Thu	Hangeul Day
2025-12-25	Thu	Christmas

* Substitute holidays are subject to change according to relevant laws.

* Business days are defined as dates excluding weekends (Saturday, Sunday) and holidays for the year provided by the Public Data Portal.

* Holiday information is updated in real-time (includes substitute holidays).

Guide to Business Day Calculator

📅What are Business Days?

Business days refer to days when actual work takes place, meaning weekdays excluding weekends and legal holidays. They are crucially used in contracts, legal documents, and project schedules.

Exclude Saturdays and Sundays
Exclude legal holidays
Calculate accurate deadlines

Business Day Calculator Use Cases

📋

Business Contracts

When accurate business day calculation is needed for contract deadlines, delivery dates, payment dates, etc.

🏛️

Legal Deadlines

Calculating legally binding deadlines such as lawsuit document submission, appeal deadlines

📊

Project Management

Project scheduling, milestone setting, work duration estimation

🇰🇷2024 Korean Holiday Information

Regular Holidays

New Year's Day
Lunar New Year Holiday (Around lunar January 1)
Independence Movement Day
Children's Day
Memorial Day

Liberation Day
Chuseok Holiday (Around lunar August 15)
National Foundation Day
Hangeul Day
Christmas

Substitute Holiday System

Substitute holidays are designated when Lunar New Year, Chuseok, or Children's Day overlap with weekends.

When holidays overlap with weekends
When holidays overlap with each other
The next weekday becomes a substitute holiday

Frequently Asked Questions (FAQ)

Q: Is the business day calculation accurate?

Yes, we calculate accurate business days by querying official holiday information from the Public Data Portal in real-time. Substitute holidays and temporary holidays are automatically reflected.

Q: Are business hours also considered?

Currently, we only calculate by date and do not consider business hours. Generally, business days are based on 9 AM to 6 PM.

Q: Are international holidays also applied?

Currently, only Korean holidays are supported. For international business, please check the holidays of the other country separately.

Q: How often is holiday information updated?

Holiday information is updated in real-time according to official government announcements. Temporary holidays are also reflected immediately when designated.