This probably could have been filed under "good" movies, but the adjective I found myself using most often was "cute".
Yesterday
What is there to say? It was really cute. There were a lot of cute moments. The protagonist is cute. His friends and family are cute. The music is great, probably even greater if you're a big fan of the Beatles (obvs).
For the longest time I couldn't figure out who was playing one of the roles, and I was like, "I know this lady! Is she Miley Cyrus? Charlize Theron?
Who?!" Turns out it was Kate McKinnon.
(She's an SNL actor who does excellent impressions of both of those women, and a ton of other people.)
I don't think it's spoilery to give this one thing away, which is that the Beatles are not the only thing that the world has forgotten. A few different times, the protagonist randomly drops a well-known thing into conversation and the rest of the people are like "the what now?" and he's like
you have got to be kidding! It's pretty hilarious and doesn't get old.
As far as I could tell, there was never any explanation for the global event/phenomenon, which is fine. Not important to the story.