O'Clock (EP)

O'Clock is the debut extended play by South Korean singer Park Ji-hoon. The album was released on March 26, 2019, by Maroo Entertainment.

Background and release
On February 19, 2019, it was announced by Maroo Entertainment that Park was aiming for a March solo debut. On March 7, it was confirmed that he would be making his solo debut on the 26th. The album name and comeback scheduler were released on March 11. The concept photos were released over the following days, with the tracklist being revealed on the 18th. A showcase to promote the comeback was held at Sangmyung University on March 26, the same day as the album's release.

Promotion
The title track and single "L.O.V.E" was not performed on any Korean music shows, due to conflicts of schedule with Park's filming of the drama Flower Crew: Joseon Marriage Agency, but it received one win on the show Music Bank.

Reception
The EP was well-received by the public, with the publication Star News calling the title track "a refreshing R&B song." O'Clock reached #1 on 11 iTunes album charts, including Hong Kong, Thailand, Taiwan, Indonesia, Malaysia, Singapore, and the Philippines. It reached a peak of #2 on the Gaon Album Chart, and "L.O.V.E" reached a peak of #59 on the Gaon Digital Chart.