I get more than enough vacation and sick leave - the way it accumulates for me is 4 hours of each per pay period. I get paid every two weeks, so that amounts to 1 day of each per month, or 12 per year of each. I also get 12 unpaid days a year. The paid days can be allowed to accrue , and they do quickly - all it takes is two years of work without taking any paid vacation days, and one can then schedule a month off.
Taking a month long vacation every two years is a pretty sweet deal, if one can get by without using up the days beforehand. Remember - there is still sick leave if you are unwell, and unpaid time available - so making those two years isn't very difficult.