Calculate duration between dates, working days, or project future and past deadlines.
Whether you are calculating notice periods, project milestones, legal filing limits, financial billing cycles, or simply counting down days to an event, date mathematics can become complicated due to varying month lengths and leap years. This tool handles Gregorian calendar calculations directly in your browser with zero server delay.
| Feature | Calendar Days | Business Working Days |
|---|---|---|
| Definition | Consecutive 24-hour periods including all 7 days of the week. | Working days excluding Saturdays and Sundays. |
| Common Use Case | Hotel bookings, warranty durations, age calculations, rental spans. | Banking clearing windows, shipping turnaround, legal contract limits. |
| Average Per Month | 30 to 31 days | 20 to 22 business days |
Select the "Date Difference" mode, choose your start date and end date, and click "Calculate". The tool will display the exact number of days, full calendar breakdown (years, months, days), weeks, business days, and total hours.
Yes. Select the "Add / Subtract Days" tab, input your start date and number of days, and check the "Business days only" checkbox. Saturdays and Sundays will be skipped automatically.
Yes. The tool features separate inputs for Years, Months, Weeks, and Days in the "Add / Subtract" mode. You can combine any combination of these units simultaneously.
After running your calculation, click the green "Add to Calendar (.ics)" button. A standard .ics file will download instantly, which you can double-click or import into Google Calendar, Apple Calendar, or Microsoft Outlook.
Yes. The calendar engine accurately accounts for February 29th during leap years across both historical and future calculations.