How can I make my cycle go away before a special weekend?

Birth control pill. The best way to reliably skip a period is to be on a birth control pill. If you see that the special weekend falls on the 4th week of the pill pack (when you are scheduled to bleed), simply open the next pack of pills and substitute these active pills for the entire week of "fake" or placebo pills. This will prevent the period from occurring. If not on already on the pill, unpredictable effects.