You only have to do that if you're in a situation where your correspondent expects same-day responses. Mostly you should try to avoid creating that expectation -- or where you do want to provide that level of service, eg for customer interactions, that sort of email should be going via some kind of role address or internal ticketing system so that it gets reliable rapid responses that don't depend on individual employees not happening to fall ill and so you can ensure cover during holidays or whatever.

(I work a four day week personally, and I never set an out-of-office response.)