Some companies are good about that, most are not I suspect.
Our corporate owner used to allow us one "weather" day off per year. But the day was only available if weather was so bad that public transportation did not operate. Here in sunny California, the only time the busses haven't run was when the drivers went on strike in 1979. Corporate has since eliminated the day.
As the only office in labor liberal California, we find a lot of the rules are being changed because what is corporate policy, and legal in 49 states, is a felony in California !
They used to require 2 weeks notice if you quit, or you lost any vacation time you had on the books. They got fined $10k for that one by the state labor commission.