Today is Veteran's Day, which of course originates from the anniversary of the day the Armistice that ended the fighting during World War I was signed. One of the things you hear constantly during the coverage of Veteran's Day commemorations is that the Armistice occurred at the 11th hour of the 11th day of the 11th month. Technically that's correct because the Armistice didn't take effect until 11 AM, but the truth is that the Armistice was actually signed shortly after 5 AM the morning of the 11th of November. However, for symbolic reasons the announcement of the Armistice was delayed until 11 AM.
All told 10,944 casualties, including 2,738 killed, were recorded between the time the Armistice was actually signed and the time it went into affect. A lot of people died for no other reason than so that the official Armistice could be recorded as the 11th hour of the 11th day of the 11th month. That is admittedly much cooler sounding than the 5th hour of the 11th day of the 11th month, though.
Update: Via Anarchologs I came across another post on this subject at Roderick T. Long's Blog. His post includes a link to "World War I Wasted Lives on Armistice Day", a somewhat long and well written article that contains many more details about that final day of unnecessary combat.