Dates, Times and Productivity
Age, date difference, business days, hours worked and time zone conversion, without relying on the server's zone.
A date difference looks like subtraction, but it is not: months have different lengths, weekends are not business days and the device's time zone moves the day boundary. These calculators count in UTC so the result does not depend on where the browser is, show the difference in days, weeks and approximate months, and refuse dates that do not exist in the calendar, such as 31 February.
How to use these calculators
- 1Enter both dates to get the difference in days, weeks and approximate months.
- 2For deadlines, count business days and check local holidays, which the tool does not assume.
- 3Across countries, enter the source and destination zones instead of adding hours by hand.
Applications in this category
Each application groups related functions on one page, with a guide for each one.
Calculators in this field
1 calculatorsFrequently asked questions
How long is a month for the calculator?
The exact count is in days; the months column uses 30.436875 days, the Gregorian calendar average, and is presented as an approximation.
Are weekends included in business days?
No. Saturdays and Sundays are excluded; national and local holidays are not assumed.