929

Titled after her birthday, "929" is a candid stream-of-conscious reflection on Halsey's many life experiences. Over the course of just under three minutes, the singer details her struggles with self-esteem, anxiety, giving up smoking, and hair loss. Tumultuous past relationships and personal fan interactions also get examined. Halsey introduced the song at her album release party by confessing, "This is probably the most uncensored song I have ever written in my life, so I'm happy to play it for you guys tonight."

In addition, Halsey touches on her relationship with her father. And I've stared at the sky in Milwaukee And hoped that my father would finally call me And it's just these things that I'm thinking for hours And I'm picking my hair out in clumps in the shower Halsey explained to Beats 1's Zane Lowe that she wrote the lyric about her Hopeless Fountain Kingdom Tour stop in Milwaukee in June 2018 that she remembered "vividly." The New Jersey pop star added that she and her father maintain a good relationship now, but at the time she "wasn't being receptive to any male energy" in her life.

The track came together as a near-freestyle in the studio booth. "I barely wrote anything down," she wrote in her Spotify Storyline about the song. "I just started spilling all of my thoughts about myself and my fans and my family, and I admit so many faults and flaws all in one go. It's forgiving, however, it ends with the acknowledgment that I am learning and growing, minute by minute."