Finanical approval calendars

I need to create a calendar for financial approval meetings and would like to start from a calendar with zero working days to allow specific work days representing dates the financial approval can take place.

I can do it the long way but wondered if anyone knew a way to force P6 to create a calenar with a standard work week of zero days?

I’ve tried and when you click ok on the work week with all the days set to 0 hours it return to the default hours.