spring forward, fall back UK /ˌspɹɪŋ ˈfɔːwəd ˌfɔːl ˈbæk/US /ˌspɹɪŋ ˈfɔɹwəɹd ˌfɔl ˈbæk/ phrase1 •Used to recall how timepieces are adjusted for daylight saving time: Local time goes forward in the spring (usually by one hour), and back in fall (autumn).
