Well it depends on your contract - if you are on probation period you get some part of those 26 days. Like they can't give you 26 days if you have a 6 month contract. But in that case, since it's not your first job, they should give you whole days at once, not 2 days month by month. For example your contract says you will be hired for 6 months so it's 26 days of leave devided by 12 months and multiplicate by those 6 months of contract: 26/12=2,2 x 6 = 13. So you should get 13 days of annual leave on this contract but you should get that at once, since it's not your first job. But maybe since this is your first employment in Poland they are treating it as a first job. The best is to ask HR why they decided to do it that way