I don't have any polling data to support this, but I'm reasonably sure Labor Day is the least understood American holiday.
Even though we've celebrated it for 120 years -- or maybe because we've celebrated it that long -- many Americans have only the vaguest idea why they're getting the first Monday in September off.
To many, it's just the unofficial end of summer. Google "Labor Day 2014" and two of the first five items suggest Labor Day is just another opportunity for retailers to get shoppers into the stores.
No wonder Americans have but a vague idea what it's ...