Thanks for your helpful response and screen shot! After I posted the message, I realized I neglected to mention that the “custom” calendar I referenced is an Enterprise calendar. Rather than having the Server administrator modify the calendar, I had the user create a custom calendar for her project, then add the extra non-working days and switch to that calendar in Project – Information. That was probably overkill; I could have done what you suggest below and have her switch the the Standard calendar and put the non-working days in there.
