Index - U
| UniversalTime | Data.Time.Clock, Data.Time |
| ut1ToLocalTime | Data.Time.LocalTime, Data.Time |
| utc | Data.Time.LocalTime, Data.Time |
| utcDayLength | Data.Time.Clock.TAI |
| utctDay | Data.Time.Clock, Data.Time |
| utctDayTime | Data.Time.Clock, Data.Time |
| UTCTime | |
| 1 (Type/Class) | Data.Time.Clock, Data.Time |
| 2 (Data Constructor) | Data.Time.Clock, Data.Time |
| utcTimeToPOSIXSeconds | Data.Time.Clock.POSIX |
| utcToLocalTime | Data.Time.LocalTime, Data.Time |
| utcToLocalTimeOfDay | Data.Time.LocalTime, Data.Time |
| utcToLocalZonedTime | Data.Time.LocalTime, Data.Time |
| utcToSystemTime | Data.Time.Clock.System |
| utcToTAITime | Data.Time.Clock.TAI |
| utcToZonedTime | Data.Time.LocalTime, Data.Time |