Same, and I leave this template in my settings so all I have to do is change the date. Simple, to the point, and no one can say they didn’t know what to do while I was out.
I had a boss that required OOO messages anytime you left the office. A single sick day, leaving four hours early, coming in two hours late, etc. This at an org that didn’t require quick email responses, and at which people typically only put up OOOs for multiple days out.

As a result, our text-based work communication has morphed into a series of strange, stilted, passive aggressive, and performatively upbeat exchanges. Much of the actual text of work email exchanges is ornamental filler language filled with exclamation points and phrases like “just looping back on this” that mask burnout, frustrated obligation, and sometimes outright contempt (the absolute best example of this is a wonderful 2015 post titled, “Just Checking In,” where writers Virginia Heffernan and Paul Ford write fake emails in this vein to see who can cause the other the most panic).
If you are checking emails while you’re out and are responding slower than normal, state that, suggests Jill Gugino Panté, director of the Lerner Career Services Center at the University of Delaware. “If you don’t have access to email and can’t return messages, state that as well,” she says. “The clearer you are in your messaging, the better.”