In most cases, the voice of your out of office message should be similar to the voice you’re using while communicating with clients. If you’re usually formal, replying with a joke could be jarring — and vice versa. Your mileage may vary, but keep that in mind before setting up an automatic reply.
I include my boss because I have different backups for five or six different parts of my job, and my boss is more likely to know the nuances of which one is the appropriate contact than the person sending the email, so it’s more likely to get to the right person if she redirects than if the emailer tries to guess which one of the six contacts I listed is the one who can solve their problem. (My specialty is the “other things as requested” section of my job description; I’m sort of a jack of all trades around here. :) )

But of course, you have to take care of a lot of year-end reports — planning out tasks, tying up loose ends, and perhaps, preparing for the coming new year. And then of course, when you are finally done and ready to take a break, there’s one final thing you must take care of while you take your break with your loved ones: Your out-of-office response.
The Uniform Holiday Bill (Public Law 90-363 (82 Stat. 250)) was signed on June 28, 1968, and was intended to ensure three-day weekends for Federal employees by celebrating four national holidays on Mondays: Washington's Birthday, Memorial Day, Veterans Day, and Columbus Day. It was thought that these extended weekends would encourage travel, recreational and cultural activities and stimulate greater industrial and commercial production. Many states did not agree with this decision and continued to celebrate the holidays on their original dates.