Character mistake: When Harley asks Tony what the light is coming from his chest, Tony responds "an electromagnet." Harley replies "What does it power?" An electromagnet is not a source of power. The arc reactor is the power source which powers both the electromagnet (to keep Tony safe from the shrapnel near his heart) and the Iron Man suit.(00:43:25)
Question: Is this movie set in December 2012, six months after the events of The Avengers movie, or December 2013? The newspaper handed to Tony in the garage is dated December 24, 2013.
Answer:With the release of Endgame, it is now fact that the Battle of New York took place in 2012.
Chosen answer:Iron Man 3 is set in December 2013, but at no point in The Avengers that I can recall was it ever stated to be 2012; that's just the year it came out, not necessarily the year it was set, so in-film continuity would suggest the Avengers is set in 2013.
Answer: With the release of Endgame, it is now fact that the Battle of New York took place in 2012.