ObjectPascal DaySpan Function Gives the fractional number of days between 2 dates DateUtils unit

function DaySpan ( const ToDate, FromDate : TDateTime ) : Double;

Description The DaySpan function subtracts the FromDate from the ToDate, returning the fractional days difference.   The Double return value contains the number of days as the integral part, and the part-day remainder as the fractional part.   For example, a difference of 2 days and 6 hours would give a value of 2.25 Related commands DaysBetween Gives the whole number of days between 2 dates DaysInAMonth Gives the number of days in a month DaysInAYear Gives the number of days in a year		Example code : Find the days difference between two date+time values. var   fromdate, toDate : TDateTime; begin   // Set up our date variables   fromDate := EncodeDateTime(2000, 01, 01, 0, 0, 0, 0);   toDate   := EncodeDateTime(2000, 01, 02, 12, 0, 0, 0);   // Display these dates and the days between them   WriteLn('From date = '+DateTimeToStr(fromDate));   WriteLn('To   date = '+DateTimeToStr(toDate));   WriteLn('Fractional days difference = '+               FloatToStr(DaySpan(toDate, fromDate))+' days'); end; Show full unit code    From date = 01/01/2000    To   date = 02/01/2000 12:00:00    Fractional days difference = 1.5 days