Oh! I get what you mean now! Well no! There is no scheme that will increase your days off allowance. What you can do is have work periods and days off periods back to back. I use my vacation days every month to increase my period to 14 days, the way that I take my vacation then is to bid days off periods back to back so that I can get a 28 day stretch to go on vacation, some guys do this from time to time (that way they commute once in a two month period and get their $2,000 every other month) but although the long stretch of days off in a row are nice, you pay for it with 6 weeks of work in a row and that can be quite long.