Date Time Counter (DTC) is used to count years/months/weeks/days/minutes/seconds for the past/future events based on current date and time, it contains a useful calculator and the 'Work Time' tool also.

The calculator is used to calculate the result date and time which equals the given date and time adds/subtracts the qty of an element of date and time and calculate the differences for every element that between the two given date and time; 'Work Time' tool is used to count every element of date and time for the time consumption of your works, you can pause/restart/stop them so as to make the same time consumption with your actual works.