Auto-attendants with a customized holiday greeting can be a festive way to mark the occasion. If you have a retail business, create a holiday greeting to inform customers of any limited-time sales you are offering. If your office is closed for the holiday, be sure you state this in your message.
When one of my colleagues went on vacation, he sent an out-of-office message that was both clever and smart. First, he sent the recipient on an imaginary scavenger hunt to "the highest peak of the tallest mountain." He used humorous absurdity to make it clear that he would not be checking email while he was away.

I’m out of town. I’m looking forward to connecting with you when I return. If you’re getting this note, it means that I’ve received your email. (Thank you!) I’ll respond to your note as soon as I can. In the meantime, here’s a list of five questions that I get asked often. I’ve included brief answers to each one below. Take a peek. You might find the answer that you’re looking for—right away! [Include brief FAQs here] I hope those FAQs were helpful. Don’t worry, though—even if your question was one of the questions listed above, I will still send a personal response to your note as quickly as I can, just to make sure that your question or problem has been completely resolved. Talk to you soon!
Hello, Thank you for your email. I’m out of the office and will be back on [DATE]. During this period, I will have limited access to email. For immediate assistance please contact by cell number at [PHONE]. Best Regards.