we had something similar at one phone-heavy place I used to work and it was actually extremely useful – everyone set their voicemail when they got in, and people would include if they were offsite (so worth ringing their mobile) or likely to be otherwise unreachable, and who to contact if your query was urgent. only took a minute to set, and was super useful to me as someone who had to talk to maybe 10-20 people on the phone in a day.
My trick though is to leave the out of office on for the first day after I return so folks know to expect delays while I get caught up/triage my inbox. Works for my company.

But I'm someone who has co-workers in almost every time zone, on almost every continent, and in almost every geographic region, and I simply can't imagine using most of these examples with co-workers in, say, South Korea or Japan or Nicaragua. Like, the account manager who reaches out to me for help accessing a particular system in Seoul doesn't need my personal story about why I'm taking time off and all the fun (or, for that matter, not fun) things that I'll be doing — they need help gaining access to [system] in order to complete the job tasks that have been assigned to them. If I am not available to help them, they need to know who can, and if there just *isn't* anyone else who can perform this task, they need to know when I will be able to.
A. No. Winter break is the shutdown of the University during a time when many activities are generally slow. Because our hospital must operate 24/7 every day of the year, UTMC employees do not have winter break. The same holds true for other essential operations, such as providing safety on all of our campuses.