Now I may be mistaken... It's happened before and it'll happen again, but I can't shake the feeling that a recent Marvel book I read referenced "A-Day" in some way. I remember it being noteworthy because of the importance of a different "A-Day" to the current DC continuity. The only Marvel "A-Day" I can find any information about online is related to the Marvel Avengers video game. Did the comics reference this event recently?

Can anyone help me out with a book and issue number in recent Marvel continuity that referenced "A-Day"?