Other mistake: When Tony's house is destroyed by the Mandarin, watch closely when Pepper is blown through the air, just before Tony attaches his suit to her - she's very obviously wearing high-heeled shoes that would make it impossible for her feet/ankles to fit correctly into the suit without them being crunched up by the suit's boots. But later on, when she gets out, if you listen, you can hear the "clicking" of her unbroken heels as she runs around.
Other mistake: Immediately before the helicopter attack on Tony's house, Maya (the "botanist") looks at the TV set, which shows a news chopper shot of the home, and says "Should we be worried about this?" It's only a moment later, when everyone looks at the screen, that a missile track appears on the screen.
Other mistake: The Miss Chattanooga Christmas Pageant should have been named "Miss Tennessee", as the pageant was made up of contestants from the various cities of Tennessee and not counties or suburbs of Chattanooga.
Answer: With the release of Endgame, it is now fact that the Battle of New York took place in 2012.