Date Dif 1.9
the author of this app says:
Date Dif is an application to calculate the elapsed time between two dates, or between now and a date. It can also calculate the number week days (Mon. to Fri.) or the number of weekend days (Sat. & Sun.) for the same period. A date can be moved forward/backwards by any number of weeks, week days, days, hours or minutes. Entries can be saved for use in the future. Time calculator allowing computations to be performed on days, hours and minutes is also included.