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 | 
| utcTimeFormat | Data.Time.Format.ISO8601 | 
| 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 |