It was written by Love and guitarist Micko Larkin and recorded alongside "You Know My Name" at Atrium Studios in Calabasas, California in early 2014 with producer Michael Beinhorn.
Love first mentioned "Wedding Day" in an interview with BUST in May 2013 where she described the song as "impeccably great as a slab of really raw rock with an insane hook".
[6] "Wedding Day" was released as a double A-side single, also featuring "You Know My Name", on May 4, 2014 on Cherry Forever Records, under exclusive license to Kobalt Label Services.
[8] Love supported the release of "You Know My Name"/"Wedding Day" with an eight-date tour of the United Kingdom, beginning at the O2 Shepherds Bush Empire in London on May 11 and concluding at Think Tank in Newcastle upon Tyne on May 22.
[14] Chris Martins of Spin referred to "Wedding Day" as "a curdled bowl of snarled vocals, grinding guitar, and pounding rhythm" in which Love "sounds plenty authoritative".