Project deadline
Measure the days between a start date and delivery date, then check the business-day count.
Date calculator
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Dates are calculated locally in your browser and are not sent to Heavens Help servers.
See examples
Add days to a date
Start from today and add 30, 60, or 90 days to estimate a future deadline.
Event countdown
Enter an event date and see how many days and hours remain.
About this helper
This date calculator combines common calendar tasks in one browser-based helper. It can compare two dates, add or subtract whole days, count weekdays, calculate age, and count down to an event. Dates are calculated locally in the browser and are not sent to the site.
Are the dates I enter uploaded?
No. All calculations run locally in your browser, and dates are not sent to Heavens Help servers.
How are business days counted?
The business-day mode counts Monday through Friday and excludes Saturdays and Sundays. It does not apply country-specific holidays in this first version.
Can I include the final date?
Yes. Difference and business-day modes include an option to count the final date when you need an inclusive range.