- Country: South Korea
- Genres: Drama, Mystery, Thriller
- Release: 2017-06-15
- Director: Sun-ho Cho
- Writers: Sang-hak Lee , Im Sun-ae , Sun-ho Cho
- Language: Korean
- Stars: Myung-Min Kim , Yo-han Byeon , Shin Hye-sun , Eun-hyung Jo , Ae-ri Lee , Kim Chae-yeon , Jeong Chan-Bae , Kim Choo-ri , Go Da-yeon , Jang Dae-Woong
- Runtime: 90 min
- Awards: 3 nominations
- AKA: A Day (United States of America) , Ngày Luân Hồi (Vietnam) , Dia sem Fim (Brazil) , エンドレス 繰り返される悪夢 (Japan) , Ha-roo , Dan (Serbia) , Bir Gün (Turkey) , El día (Mexico) , A Day (France, French Republic) , A Day (Philippines) , A Day (Germany) , Pętla (Poland) , Un día (Spain) , Один день (Russian Federation) , A Day (United Kingdom) , Ha-roo (Korea) , A Day , O zi (Romania)Ha-roo, 一天 (China), 하루
- Plot: A mystery drama revolving around a father who commits an unethical act in an attempt to save his daughter's life. Three years later, his actions return to haunt him, trapping him in an endless time loop.
- IMDB:tt6890376
A Day Cast · · · ALL
Sun-ho Cho
Director
Myung-Min Kim
Jun-young
Yo-han Byeon
Min-chul
You Chea-myung
Kang-sik
Eun-hyung Jo
Eun-jung
Shin Hye-sun
Mi-kyung
Im Ji-gyu
Yong-sun
Ye-June Kim
Ha-roo