“365” is a collaboration between Zedd and Katy Perry. The track was originally confirmed by Zedd in August 2018 and later registered online in January 2019.
It was rumored that the release date for “365” would be February 7th, 2019, but the song was actually released on February 14th after Katy teased the music video on Instagram with the caption “Valentine’s Day is going to be extra obsessive this year”.