Calculate Net Working Days

Hi manojnikam3008 - with a Date table this becomes really easy. 
The measure is this:

Working Days = 
CALCULATE(
    COUNTROWS('Date'),
    'Date'[IsWorkingDay] = TRUE()
)

You can then create another measure to multiply that measure by 8 or whatever to get hours.

See the file here for how this works.
You'll notice I have filtered the date slicer by valid data in the fact table:

Valid Data is just a measure that is COUNTROWS(Timesheets) - if there are records, the slicer will show it. Future and past dates though won't show up.

If that isn't what you want, please provide more specifics per the info below. But the point is with a good date dimension table, the DAX becomes very easy.

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