They will not call you on your golden day. They should not fly you into a golden day. Regular X days are different - they can call you on an X day and also fly you into an X day. They will comp you with days off later in the month - as a matter of fact if the category is short, guys will bid a reserve line that starts with X days hoping to get called out and start a "rolling X day" schedule in which they are constantly flying on X days and keep pushing their comp days off. I don't know exactly how it works because I have never tried it but I know guys were getting paid for 100 - 125+ hours a month without flying over 80-85 hours. The best way I heard an X day described is that it is a duty day with no obligation - ie. You do not have to answer the phone - but if you do you are obligated to fly. Also if you are flying and get into irregular operations such as wx or maint you can be stuck flying into anything - golden days, x days or even vacation. I believe they can reroute you into X days fairly easily (with comp days later) but I am not sure about what would happen if they tried to reroute you into golden days or even if they could. I rarely fly reserve lines so I don't know.
Scoop