DaysDiff Tool
Days Counter & Business Days
If left blank, today will be used as the reference date.
If left blank, today will be used as the reference date.
If you want to exclude holidays, select the applicable country or region.
Calculate Period...
Result
If you want to find the date that falls a certain number of days after or before a specified date, please use " this " tool.
How to Use the DaysDiff Tool and Where It Helps
This tool instantly calculates the number of days between two specified dates.
It can be used for everything from business deadline management to counting down to important anniversaries.
For work progress and resource management
Accurately grasp the actual working days until a project is completed. It can be used as a basis for smoother task allocation and progress sharing within a team.
For planning life events
Check the countdown until an expected due date or how many days have passed since a family anniversary. By understanding important milestones in numbers, it helps with preparation and writing messages.
For motivation toward achieving goals
Make the remaining days until a certification exam or competition visible. By keeping the deadline clearly in mind, it becomes a guide that improves focus in daily study or training.
For managing deadlines for official documents and contracts
Visa renewal deadlines, passport validity periods, rental contract expiration dates, and more. Quickly check important deadlines that must not be forgotten and prevent trouble before it happens.
From business day calculations to copying date lists, handle all period and day-count calculations in one place
This DaysDiff Tool is a free tool that lets you quickly check the difference in days simply by entering a start date and an end date. In addition to simple day counts, it also supports practical business day calculations and exporting lists of target dates, all on a single page.
Calculate excluding selected weekdays and holidays
Supports conditions such as Monday to Friday only, excluding weekends and holidays, or excluding only specific regular closing days, so you can check the number of days based on business days or actual operating days that are closer to real work.
Copy the list of target dates as is
You can copy not only the full list of dates within the period, but also the list of dates finally included in the calculation and the list of excluded dates, reducing the effort required for sharing and transcription.
Easy to use for deadline management and application work
Useful in situations where you want to check day counts and manage date lists together, such as confirming delivery deadlines, managing application periods, preparing for events, and tracking contract renewal dates.
Supports holiday data for countries and regions around the world
Business day calculations can take into account major holiday data for each country and region. It also helps you smoothly confirm delivery dates with overseas offices and manage schedules for global projects.
Frequently Asked Questions
- Q. Can I calculate business days or operating days for a store or company?
- A. Yes, you can. By checking the weekdays that are regular closing days for your store or company and selecting Holidays, you can count only the actual operating days. Please use it for business deadline management or checking store operating days.
- Q. Is there a limit to the period that can be calculated?
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A.
There is no particular limit. You can freely set periods in the past or future, from looking back over decades of history to counting down to a deadline just a few days away.
However, when you calculate with Exclude Holidays enabled, please note that for dates extremely far in the past or future, holiday data may not be available and accurate calculation may not be possible. - Q. Can I return only some of the excluded dates to the calculation target?
- A. Yes, you can. For example, after calculating with Holidays excluded, if you want to include only specific holidays in the day count, open the Excluded dates list shown in the calculation result. Uncheck the dates you want from the list and click Recalculate with these settings to see the result with only those dates returned to the calculation target.
- Q. Is the content I entered saved?
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A.
Yes. The input data is stored only in your browser by using localStorage.
The dates you enter and the checkbox states are saved on your own device, so you can continue where you left off the next time you visit.
On this site, language settings, time zones, and the entered date range are temporarily referenced only to correctly determine holidays and auto-select regions, but none of this information is ever collected or recorded on the server side.
Because the core calculation process runs entirely in your own browser, you can use the tool without worrying about privacy.
About Holiday Data
The holiday data used by this tool is obtained from Google Calendar API holiday calendars. Because the content and update timing depend on Google public calendars and the public announcements of each country and region, this site cannot guarantee the completeness, timeliness, or accuracy of the data, and cannot accept responsibility for any damages or other losses arising from the use of that data.
- The country and region select box displays only the countries and regions for which holiday data retrieval is currently supported by the data source.
- Holiday determination follows the official data provided by Google Calendar. For regions where data is not provided, or for years that have not yet been announced, calculations excluding holidays cannot be performed.
- The available range for future and past years, as well as names and counts, differ by country and region and may change due to specification changes or changes in published content on the Google side.