The phrase "What a difference a day makes" is an idiomatic expression that means a lot can change in a short period of time, typically within one day. It often reflects a significant positive or sometimes surprising change that happens from one day to the next. For example, if someone was feeling ill one day and much better the next, they might say "What a difference a day makes!" to express how much their situation improved in just 24 hours.
Additionally, "What a Difference a Day Makes" is also a well-known popular song originally written in Spanish by María Grever and recorded in English by Dinah Washington in 1959. Recently, British singer-songwriter RAYE released a cover of this song on September 5, 2025, featured in the upcoming Netflix series titled "Black Rabbit," scheduled to release on September 16, 2025. RAYE also appears in the series performing the song as herself.
In summary:
- The phrase signifies how quickly circumstances can change in a day.
- It's also the title of a classic song, with a recent cover by RAYE tied to a Netflix series.