When I worked for large companies, personal days were distinct from vacation days in that you couldn’t string them together to get a longer chunk of time off, and tacking them on to either end of a vacation stretch was definitely frowned upon. Days off in succession required the use of either vacation days or sick days (and more than 3 sick days in a row required a doctor’s note). Although some people I knew took their personal days just to have the occasional long weekend, most used them for things like religious holidays important to the more observant, being home for maintenance work/deliveries, doctor/dentist appointments (in which case you could take just half the day), etc. You didn’t have to justify the use of your day, but you did have to clear it in advance with your supervisor.
Rashak Mani, sick days are typically “last minute” calls in the morning to your supervisor that you aren’t coming in that day. For my former employers, you were expected to call and confirm you would not be in for that day even if your boss had already been told the day before that you had a raging case of the flu or whatever. Sick days taken right after holidays or vacation were usually regarded with deep suspicion, and a couple of times I know the boss called the employee’s home during the day to make sure they were actually home in bed sick. Abuse of sick days, especially if it put others at a disadvantage, reflected poorly on your yearly merit reviews.
[aside] Of the two larger companies I worked for, Jonathan Woodall’s vacation scheme was the standard. The bummer for me personally is that in both cases I left just before I would have become eligible for 3 weeks vacation in the year. Since I went back to school in 1990 (through a 2d bachelor’s, grad school and now work for a tiny company), I’ve had exactly one full, uninterrupted week devoted solely to rest and relaxation, and that was in 1997. sigh [/aside]