The phrase "When We Were Young 2023" primarily refers to the When We Were Young Festival held in 2023, which is an annual pop punk and alternative music event. The 2023 edition took place on October 21 and 22 at the Las Vegas Festival Grounds, featuring major bands such as Green Day, who headlined the Green stage, and blink-182, who headlined the Pink stage. Other notable bands included Joyce Manor, Less Than Jake, Thrice, Beach Bunny, The Offspring, Good Charlotte, Sum 41, Rise Against, New Found Glory, and many more. The festival was known for its nostalgic theme harkening back to the music of youth and punk rock culture.
Additionally, there is a 2023 official music video for the song "When We Were Young (The Logical Song)" by David Guetta & Kim Petras, which adds a musical context to the phrase in 2023.
There is no widely recognized movie specifically titled "When We Were Young" released in 2023, but there is a film called "While We're Young" from 2014, which is unrelated to the year 2023.
If looking for information related to a specific medium (festival, song, film), the festival appears to be the most prominent reference for "When We Were Young 2023."