Advanced Date Time Calculator

Advanced Date Time Calculator is an app that lets you calculate how much time has passed between two specific dates. First you have to enter the day, month and year either manually or using the built-in calendar.

Once both fields are filled in, the tool will automatically run the calculation and display the difference. You can copy the result to the clipboard, but you cannot copy the output expressed in elements, i.e. only in years, months, weeks and so on.