"Ruined in a Day" is a song by English rock group New Order. It was released on 21 June 1993 by London Records as the second single from their sixth studio album, Republic (1993). The song also appeared on the group's Best of compilation the following year and on the 2005 chronology Singles.

New Order are an English rock band formed in 1980 by vocalist and guitarist Bernard Sumner, bassist Peter Hook, and drummer Stephen Morris. The members regrouped after the disbandment of their previous band Joy Division due to the suicide of lead singer Ian Curtis. They were joined by Gillian Gilbert on keyboards later that year. New Order's integration of post-punk with electronic and dance music made them one of the most acclaimed and influential bands of the 1980s. They were the flagship band for Manchester-based independent record label Factory Records and its nightclub The Haçienda, and they worked in long-term collaboration with graphic designer Peter Saville.