In Avengers: Endgame, Tony Stark and Steve Rogers go to...
...the Shield base in New Jersey, on a specific date in 1970. Tony says it's a date that he knows that his father and Hank Pym will both be working there.
Why did Tony pick that day? Picking the year seems obvious, but why that day?
I had guessed that perhaps...
...that is Tony's birthday, and he knows that his father had been at work right before he was born.
But I don't know if there's any way to verify that inside the MCU.
Edited to add: I'm not concerned with why they would go there (that seems obvious, and the other question addresses it); I'm asking about the specific month and day Tony chose.