"What a Time" is a song by American singer and songwriter Julia Michaels featuring Irish singer-songwriter Niall Horan, from her fourth EP, Inner Monologue Part 1 (2019). The song was written by Michaels, Justin Tranter, Casey Barth, and Riley Knapp, and produced by Ian Kirkpatrick and RKCB. It was sent to Australian radio on March 29, 2019, as the second single from the EP and was the second most added song days after its release. It was nominated at the Teen Choice Awards 2019 for Choice Collaboration.