The restaurant industry is known for being fickle; if a few coworkers call in sick, you're gonna find yourself in a bit of a pickle… that is, as a manager. But as someone in a management position, that is your problem; not the other employees' issue. In this case, OP's boss initially approved their vacation but quickly backpedaled when it became apparent that they had granted time off to too many other employees, meaning that now they were short-staffed. Tough luck, as OP was already on their v…