"Party O'Clock" is a song recorded by South Korean girl group Nmixx for their third single album A Midsummer Nmixx's Dream. It was released as the album's lead single by JYP Entertainment on July 11, 2023.

Background and release
On June 20, 2023, JYP Entertainment announced Nmixx would be releasing their third single album, titled A Midsummer Nmixx's Dream, on July 11. On June 26, the track listing was released with "Party O'Clock" announced as the lead single. On June 30, the highlight medley teaser video was released. On July 9, the music video teaser was released. The song was released alongside the album and its music video on July 11.

Composition
"Party O'Clock" was written by J.Y. Park "The AsianSoul", Danke (Lalala Studio), Dr. Jo, Hwang Yu-bin (Verygoods), Wkly, Lee Seu-ran (JamFactory), and Oh Hyun-seo (Lalala Studio), composed by Josefin Glenmark, Paulina "Pau" Cerrilla, Harry Sommerdahl, Fabian "Phat Fabe" Torsson, and J.Y. Park "The AsianSoul", and arranged by Bangers & Cash. It was described as "garage-based" pop song characterized by "bright and exciting melody" with lyrics about "solving the mysterious things that happen in the forest on a midsummer night". "Party O'Clock" was composed in the key of A minor, with a tempo of 128 beats per minute.

Promotion
Prior to the release of A Midsummer Nmixx's Dream, on July 11, 2023, Nmixx held a live event on YouTube to introduce the single album and its song, including "Party O'Clock", and to communicate with their fans. The group subsequently performed on four music programs: Mnet's M Countdown on July 13, KBS's Music Bank on July 14, MBC's Show! Music Core on July 15, and SBS's Inkigayo on July 16.

Credits and personnel
Credits adapted from album's liner notes.

Studio
 JYPE Studio – recording
 Glab Studio – mixing for Dolby Atmos
 821 Sound Mastering – mastering

Personnel

 Nmixx – vocals
 Emily Yeonseo Kim – background vocals
 J.Y. Park "The AsianSoul" – lyrics, composition
 Danke (Lalala Studio) – lyrics
 Dr. Jo – lyrics
 Hwang Yu-bin (Verygoods) – lyrics
 Wkly – lyrics
 Lee Seu-ran (JamFactory) – lyrics
 Oh Hyun-seo (Lalala Studio) – lyrics
 Josefin Glenmark – composition
 Paulina "Pau" Cerrilla – composition
 Harry Sommerdahl – composition
 Fabian "Phat Fabe" Torsson – composition
 Bangers & Cash – arrangement, instruments
 Goo Hye-jin – recording
 Seo Eun-il – recording
 Curtis Douglas – mixing
 Shin Bong-won – mixing
 Park Nam-joo – mixing (assistant)
 Kwon Nam-woo – mastering
 Sophia Pae – vocal directing
 Song Hee-jin (Solcire) – vocal directing
 Mr Cho (Solcire) – vocal directing
 Jiyoung Shin NYC – vocal editing

Charts

Release history

References

Nmixx songs
2023 songs
2023 singles
Korean-language songs
JYP Entertainment singles