Someday or One Day is a 2019 Taiwanese time-travel series. It was first broadcast on CTV every Sunday at 10:00 pm, starting 17 November 2019.

Plot

The year is 2019. A 27-year-old woman named Huang Yu-Hsuan (Ko Chia-yen) pines for the love of her life, her long-time boyfriend Wang Chuan-Sheng (Greg Hsu), constantly checking his social media pages and desperately hoping he will call her, asking to get back together.