Data.Time.LocalTime.Compat

Scale by a factor. Note that scaleCalendarDiffTime (-1) will not perfectly invert a duration, due to variable month lengths.

Get the configured time-zone for the current time.

Get the configured time-zone for a given time (varying as per summertime adjustments).

On Unix systems the output of this function depends on:

1. The value of TZ environment variable (if set)

2. The system time zone (usually configured by /etc/localtime symlink)

For details see tzset(3) and localtime(3).

Example:

> let t = UTCTime (fromGregorian 2021 7 1) 0
> getTimeZone t
CEST
> setEnv "TZ" "America/New_York" >> getTimeZone t
EDT
> setEnv "TZ" "Europe/Berlin" >> getTimeZone t
CEST

On Windows systems the output of this function depends on:

1. The value of TZ environment variable (if set). See here for how Windows interprets this variable.

2. The system time zone, configured in Settings

addLocalTime a b = a + b

diffLocalTime a b = a - b

Get the UT1 time of a local time on a particular meridian (in degrees, positive is East).

Get the UTC time of a local time in a time zone.

Get the local time of a UT1 time on a particular meridian (in degrees, positive is East).

Get the local time of a UTC time in a time zone.

Get the time of day given the fraction of a day since midnight.

Convert a count of days and a time of day since midnight into a period of time.

Convert a time of day in some timezone to a time of day in UTC, together with a day adjustment.

Hour twelve

Hour zero

Same as timeToTimeOfDay.

Same as timeOfDayToTime.

Get the fraction of a day since midnight given a time of day.

Get the time since midnight for a given time of day.

Convert a period of time into a count of days and a time of day since midnight. The time of day will never have a leap second.

Get the time of day given a time since midnight. Time more than 24h will be converted to leap-seconds.

Convert a time of day in UTC to a time of day in some timezone, together with a day adjustment.

Create a nameless non-summer timezone for this number of hours.

Create a nameless non-summer timezone for this number of minutes.

Text representing the offset of this timezone, such as "-0800" or "+0400" (like %z in formatTime).

Text representing the offset of this timezone, such as "-0800" or "+0400" (like %z in formatTime), with arbitrary padding.

The UTC time zone.

A simple day and time aggregate, where the day is of the specified parameter, and the time is a TimeOfDay. Conversion of this (as local civil time) to UTC depends on the time zone. Conversion of this (as local mean time) to UT1 depends on the longitude.

Time of day as represented in hour, minute and second (with picoseconds), typically used to express local time of day.

TimeOfDay 24 0 0 is considered invalid for the purposes of makeTimeOfDayValid, as well as reading and parsing, but valid for ISO 8601 parsing in Data.Time.Format.ISO8601.

A TimeZone is a whole number of minutes offset from UTC, together with a name and a "just for summer" flag.

A local time together with a time zone.

There is no Eq instance for ZonedTime. If you want to compare local times, use zonedTimeToLocalTime. If you want to compare absolute times, use zonedTimeToUTC.