Some managers in our company have adopted the practice of approving their subordinates' day off by making them to request a meeting in Outlook. That is, if I want to take a personal day off, I'm expected to send meeting request to my boss, who will either accept it, or decline. If he accepts, then my absence will be on his calendar as all-day meeting, however with availability=free and without reminder.
From my point of view, this practice clutters boss' calendar with appointments that in fact are not appointments; every now and then it comes up as "busy" rather than "free", which falsely makes calendar owner unavailable for the day; also, occasionally the reminder is set, which causes the alarm on boss' (synchronized) iphone to go off at midnight.
I wonder, are there good alternatives? i.e. some other practices that allow a manager to manage time off of his subordinates not pretending that they are appointments?