I once had a coworker who would put up OOOs for absolutely everything, and it irked me to an unreasonable level. Spending the afternoon working with a colleague on a project? OOO. Just returned from vacation and trying to catch up? OOO. A lot of meetings that day? OOO.
By completing these items, you alleviate any concerns that may arise during your closure. This also ensures your business continues providing transparency to your customers. No misunderstandings.

“The world is serious enough as it is - people need, and usually appreciate, an unexpected moment of levity in their day,” he says, when quizzed about how recipients might respond to such an OOO. He also confides that he himself has dispensed with auto responses altogether – though not for idealistic reasons. “The last time I tried to set one up, I botched it so badly that somehow it resent every single email in my outbox from the previous year - client emails, firing notices, literally thousands of emails.”
One year my organization mistakenly left me off the phone directory. I made no attempt to correct that. The only people who could call me we’re those who knew my number; everyone else had to use email.