Off.
Maybe one or two rest days as well and a couple of standbys also thrown in and then the flights on top to make up the month. Beauty is you can request up to 8 days off per month and if you can string them all in a row then do some swaps with other crew, I have seen people with sometimes 10 to 12 off in a row. That's not to say it's routine but it is possible.
Best I ever saw was a skipper who got the last eight of one month off, the first eight of the next month and was given another off as well. Swapped two flights and ended up with 20 days off in a row!!
