Sick day policies vary widely. My former employer offered no sick days for those on a wage, and no sick days for the permanent, full-time staff. They got 1 personal leave day a month, and they could use those as sick days when needed.
My friend works for the State of Oregon and he gets 1 sick day every 30 days as well as 1 personal day. My dad is a contracted employee of a school district in Washington and he only gets 3 personal days a year (non-cumulative), but his contract only covers so many days of the year--he gets the entire month of July off. He also accumulates about 1 sick day per 30 days. When he had to cash in his sick days when he left Washington some years ago for another job out of state, he had a year's worth (180 days) of sick leave accumulated. He was able to cash them out, which bought us new furniture
Additionally, he gets days off for professional development, which are days to attend conferences and meetings, since he's the President of the league his school belongs to, and active in leadership for his field in Washington State.