What is that “dash” between some holdays?
The dash between holidays indicates a linked holiday, in which every date between the two holidays is also treated as a holiday. This can be very useful if you intend to shut down a program for an extended length of time. You simply specify the start and end dates and the whole span becomes one long day off. You signify a linked holiday by pressing the colon key (:) twice instead of once between entries in Master Entry #4 (Holiday Setup).