Re: election and elections
I think, because we are voting on so many offices at once, that we tend to use "elections" in the US, though we certainly say "election day" here too.
In addition to voting for president a couple weeks ago, I voted for my US Congressman, my US Senator, my state Assemblyman, possibly my state senator (I was numb by then), the state attorney general, and the state auditor (I didn't even know we had one).
I definintely said many times leading up to "election day" how I couldn't wait for "the elections" to be over so we wouldn't have to see any more commercials.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.