Not only is the story set over a much longer time period than most movies (more on that later), but because the settings are constantly repeating there was efficiency found in grouping disparate sequences together for shooting days.
This made it an extra special experience for Andy Samberg and Cristin Milioti, but the latter found her way to keep everything organized: maintaining detailed notes in her script.
Because the vast majority of films are shot out order, the challenge of an actor adjusting their performance to match their emotional state with where a scene takes place in a narrative is one frequently faced – but Palm Springs still presented an abnormal situation for its stars.