"One day," Tony said in exasperation. "There has to be one holiday we can all agree on."
National and religious holidays were out for obvious reasons.
"Halloween?" Clint suggested.
Steve shook his head wearily. "Thor."
Okay, yeah, Thor might take that one a little too literally.
Bruce looked up from his work. "Pi Day."
Steve raised an eyebrow.
"No, no, that could work," Tony said excitedly. "It's a real thing, Cap. It celebrates both math and food. What's not to like?"
"That would depend on who was making the pie."
"I make one mistake in the kitchen - "
"I was a kid for a week!"
"One time! It could happen to anybody!"
"Anybody with a last name of Stark, maybe."
Despite the ensuing argument, Pi Day it was.