Time Flies is the first greatest hits and second overall compilation album by Japanese idol girl group Nogizaka46. It was released on December 15, 2021, through N46Div., and Sony Music Records, two years and nine months after its predecessor studio album, Ima ga Omoide ni Naru made (2019) for the tenth-anniversary celebration of the group.

Nogizaka46 is a Japanese female idol group produced by Yasushi Akimoto, created as the official rival of the group AKB48. They are the first group from the Sakamichi Series, which also includes sister groups Sakurazaka46, Yoshimotozaka46, and Hinatazaka46.