DayCount is a small easy-to-use program that allows you to quickly calculate number of days( hours) between dates, and date of the day any number of days(hours) from another date. The program stores all dates you have entered, and you can select dates from a list quickly.
This software is a shareware. You will be able to download and test DayCount during a certain period of time, then, if it does what you need, you will have to acquire the full version from DayCount publisher. The DayCount 2.08 free trial version contains an installer, and has a size of 222 Kilobytes.
For additional information and support request, please contact directly DayCount publisher.

DayCount Screenshot