I don't know. My memory of 2012 is already a bit fuzzy, but iirc, it was delayed that year from March to the end of April.
The GOP-e was complicit, as witness the quote by Romney, when someone asked him why he wasn't even making one appearance in Texas despite its being such a loaded State. Romney said, cynically, "They'll come to me when I'm the last man standing", viz., it was all over but the shouting and Texas finally got to vote after the race was over.
I like to think that it was that abusively instrumentalist attitude that cost him the election. The man was a tool, and everyone knew it by Election Day.
I agree, Romney was a huge disappointment in many ways. Only good thing I can say about Romney is he might have been better than Obummer.
Now it is 8 years of degradation of country accomplished by the community organizer, socialist income redistribution-er from those who work to those who prefer not to work, Muslim brotherhood backer, and never having run anything productive in his entire life, the country needs a strong statesman to change direction. If Hillary wins, I will apply for residency in New Zealand or Australia. They both have strict immigration policies..you either bring high skills or tons of money. Our country is being run over by unskilled and welfare dependent invaders.