This story was inspired by "Fury's Big Week", a limited series comic book published in 2012 that served as a tie-in to Phase one of the Marvel Cinematic Universe. It explained how the events of Iron Man 2 (2010), The Incredible Hulk (2008) and Thor (2011) were happening at the same time. Hence the title cards featuring the days of the week in between scenes.
Coulson's password ends with 0-7-0-4. July 4th is Steve Rogers birthday.
This story takes place in the Earth-51825 version of the Marvel Universe.