[Tri-ring]

Originally Posted by Goggen

Okay, so -

Spoiler for movie plot:

if it's about their graduation trip - how does it take place "while they are still attending high school"?

Looks as if I got it right.

Spoiler for Answer:

There is a thing called spring break, graduation usually takes place on the 2nd week of March and new semester starts in April so they roughly got two weeks of free time.
Should have known they were heading for London. I bet that the movie will be sprinkled with homage to the Beatles movie like "Magical Mystery Tour" and/or "It's been a hard day's night"