Originally Posted by crewdawg

You can't do that with vacation. Pretty much anything that is considered "work," such as CQ, other sim events, ALPA duties, etc... will allow you to go below 4 days. You can only go less than 4 days at the beginning of the month IF you had work on the last day of the previous bid month that would make it a 4 day stretch. At the end of the month you can always put as little as 1 day of reserve because you could always bid reserve (or a trip) at the beginning of the next month that would make a 4 day block.

I highly recommended you get the John Bell reserve line simulator. I use it every single month I bid reserve (nearly every month) just to double check that what I'm asking for is legal. It's saved me plenty.

Reserve Line Simulator