LogFAQs > #979181325

So from my understanding of various jobs who have had policies:

If you had to call in and say I am having emergency surgery and I'll miss today, sorry. That's a sick day.
If you then say "I'll also need Tuesday and Wednesday off" those would be vacation days since you're doing it ahead of time.

But each job can differ how they use them. My job now doesn't give a shit and probably likes it that I use sick days in place of vacation sometimes since I can carry over unlimited sick days each year and that lowers the amount.