World War I – known at the time as “The Great War” - officially ended when the Treaty of Versailles was signed on June 28, 1919, in the Palace of Versailles outside the town of Versailles, France. However, fighting ceased seven months earlier when an armistice, or temporary cessation of hostilities, between the Allied nations and Germany went into effect on the eleventh hour of the eleventh day of the eleventh month. For that reason, November 11, 1918, is generally regarded as the end of “the war to end all wars.”
Seconded, with one exception: I got one once from a distant coworker which said “I have broken my arm in a kitten-related fall and will be out for (…)”. Everyone else uses boilerplate language so that one definitely stood out, but I thought it was the right level of mildly amusing.

While it’s vital that you get the main points across in any vacation email, brevity is important. If you’re looking for something a little more to-the-point, try this one:
I think that’s on the person who covered for you –presumably they are in your department. If I take care of a client for Fergus while he’s out, I let him know the problem that came in, solution, and any still pending information. Emailer emails Vickie. May not just forward the message that they sent to or received from me. Vickie gets these kinds of questions every day, doesn’t know it has anything to do with me, just answers the question. I get back, see the message, and may not realize Vickie has already handled it. That’s not Vickie’s fault. I think ENFP in Texas has it right above – before starting the work, you can ask the sender if they still need this.