There ought to be a word - and perhaps there is, in German - for the mix of feelings that accompanies composing and activating a holiday out-of-office message. There's smugness, of course, and a gratifying sense of laying down one's virtual tools after a horribly long shift. But for many of us, these nice feelings are tempered by the knowledge that in two weeks, refreshed but depressed, we will have to trawl through hundreds of emails, many of which will be conference room notifications for meetings about crises that have passed.
This is an automatic reply. Thank you very much for your email. I am currently on holiday until [date], I will not be able to respond to your emails promptly until I am back to the office. In the event that you need an urgent response, please call the office directly on: 1) Office Lines (Working Hours, Monday-Sunday + 3GMT): [Tel Numbers]

The problem was that this had to be done on deadline and people wanted me to do other things for them that weren’t time sensitive. So I put up an internal-only out of office that basically said “hey sorry I’m working on project X and we have a tight deadline. If this isn’t urgent I’ll get back to you next week. If it is urgent, let me know!”
Notice of Office Closure for Holiday for Whole Day/ Early Closing. It is always advisable that the notice of any holiday, when the office will remain closed, should be given well in advance - so that no employee is put to inconvenience of coming to the office on a day when it is closed.