Apple’s iCal Subscription calendar for US Holidays — which you can find at http://macte.ch/U94vs — has the wrong date listed for the 2012 presidential election.
It lists it election day as Nov. 13, 2012; that’s the second Tue of the month. However, election day falls on the Tuesday after the first Monday of the mont. In other words, Tuesday, Nov. 6, 2012.