Data.Time

Quick Start

Use these types for time regardless of location (not caring about leap-seconds):

• UTCTime for actual times
• NominalDiffTime for differences between times, i.e. durations

Use these types for the ways people refer to time:

• Day for something like June 27th 2017
• TimeOfDay for something like 5pm
• LocalTime for a Day with a TimeOfDay
• TimeZone for a time zone offset (not actually the time zone itself) like -0700
• ZonedTime for a LocalTime with a TimeZone

Use this for low-latency timing:

• SystemTime

These are less commonly needed:

• AbsoluteTime and DiffTime if you do care about leap-seconds.
• LeapSecondMap for tracking the leap-seconds
• UniversalTime for time based on Earth rotation

Documentation

module Data.Time.Calendar

module Data.Time.Clock

module Data.Time.LocalTime

module Data.Time.Format