How do I calculate the number of days between two dates?

Select the 'Date Difference' mode, pick a start date and end date. The calculator shows years, months, days, total days, total weeks, and business days (excluding weekends) between them.

How many business days are there between two dates?

Use the 'Business Days' toggle to exclude weekends from the calculation. The default weekend is Saturday-Sunday, but you can customize which days to exclude (e.g., Friday-Saturday for Middle Eastern countries).

How do I add 30 days to today's date?

Switch to 'Add/Subtract' mode, keep the base date as today, enter 30 in the days field, and click 'Calculate'. The result shows what date falls 30 days from today, and the day of the week.

Date Calculator | Days Between Dates & Business Days

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Start Date

End Date

Business Days Only

0 days

Customize Weekend Days

Global Date Format & Workday Standards

Date formats and work weeks vary dramatically around the world. The United States uses MM/DD/YYYY, while most of Europe, Asia, and Australia use DD/MM/YYYY. ISO 8601 (YYYY-MM-DD) is the international standard used in computing and diplomacy, and this calculator uses it for all inputs.

Standard work weeks also differ: while Saturday-Sunday is the weekend in most Western countries, Saudi Arabia, UAE, and several Gulf states observe Friday-Saturday weekends. Brunei and parts of Malaysia have Friday-Sunday weekends. Israel's work week runs Sunday-Thursday (Friday-Saturday weekend). This calculator's customizable weekend setting lets you accurately count business days for any country's schedule.

Excel Date Function Equivalents

Excel Function	What It Does	This Calculator
`DATEDIF(A,B,"D")`	Days between dates	Date Difference mode
`DATEDIF(A,B,"M")`	Months between dates	Shown in result breakdown
`NETWORKDAYS(A,B)`	Business days (Mon-Fri)	Business Days toggle
`EDATE(A, N)`	Date + N months	Add/Subtract mode
`A + N`	Date + N days	Add/Subtract mode

Excel Function

What It Does

This Calculator

DATEDIF(A,B,"D")

Days between dates

Date Difference mode

DATEDIF(A,B,"M")

Months between dates

Shown in result breakdown

NETWORKDAYS(A,B)

Business days (Mon-Fri)

Business Days toggle

EDATE(A, N)

Date + N months

Add/Subtract mode

A + N

Date + N days

Add/Subtract mode

Frequently Asked Questions

How do I calculate days between two dates?

Select "Date Difference" mode, choose a start date and end date. The calculator instantly shows the difference in years, months, total days, and total weeks. Check "Business Days Only" to count only working days excluding weekends.

How many business days are between two dates?

Toggle the "Business Days Only" checkbox in Date Difference mode. The calculator counts only Monday-Friday by default. You can customize which days count as weekends (e.g., Friday-Saturday for the Middle East) using the "Customize Weekend Days" section.

How do I find what date is 30 days from today?

Switch to "Add / Subtract" mode. The base date defaults to today. Select "+ Add", enter 30 in the Days field. The result shows the date 30 days from now and its day of the week.

Does the calculator account for leap years?

Yes. All calculations use JavaScript's built-in Date object which correctly handles leap years, including the special rule that century years (e.g., 2100) are NOT leap years unless divisible by 400 (e.g., 2000 was a leap year).

Can I calculate business days with a non-standard weekend?

Yes. Expand "Customize Weekend Days" at the bottom of the calculator. Uncheck your actual weekend days. For example: for Israel (Fri-Sat weekend), check Fri and Sat. For UAE (Fri-Sat), same. For a 7-day work week, uncheck all days.