time-1.11.1.1: A time library
Safe HaskellSafe
LanguageHaskell2010

Data.Time.Format

Synopsis

UNIX-style formatting

class FormatTime t Source #

Minimal complete definition

formatCharacter

Instances

Instances details
FormatTime CalendarDiffDays # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> CalendarDiffDays -> String) Source #

FormatTime Day # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> Day -> String) Source #

FormatTime Month # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> Month -> String) Source #

FormatTime DayOfWeek # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> DayOfWeek -> String) Source #

FormatTime DiffTime # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> DiffTime -> String) Source #

FormatTime NominalDiffTime # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> NominalDiffTime -> String) Source #

FormatTime UTCTime # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> UTCTime -> String) Source #

FormatTime UniversalTime # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> UniversalTime -> String) Source #

FormatTime CalendarDiffTime # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> CalendarDiffTime -> String) Source #

FormatTime TimeZone # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> TimeZone -> String) Source #

FormatTime TimeOfDay # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> TimeOfDay -> String) Source #

FormatTime LocalTime # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> LocalTime -> String) Source #

FormatTime ZonedTime # 
Instance details

Defined in Data.Time.Format.Format.Instances

Methods

formatCharacter :: Bool -> Char -> Maybe (FormatOptions -> ZonedTime -> String) Source #

formatTime :: FormatTime t => TimeLocale -> String -> t -> String Source #

Substitute various time-related information for each %-code in the string, as per formatCharacter.

The general form is %<modifier><width><alternate><specifier>, where <modifier>, <width>, and <alternate> are optional.

<modifier>

glibc-style modifiers can be used before the specifier (here marked as z):

%-z
no padding
%_z
pad with spaces
%0z
pad with zeros
%^z
convert to upper case
%#z
convert to lower case (consistently, unlike glibc)

<width>

Width digits can also be used after any modifiers and before the specifier (here marked as z), for example:

%4z
pad to 4 characters (with default padding character)
%_12z
pad with spaces to 12 characters

<alternate>

An optional E character indicates an alternate formatting. Currently this only affects %Z and %z.

%Ez
alternate formatting

<specifier>

For all types (note these three are done by formatTime, not by formatCharacter):

%%
%
%t
tab
%n
newline

TimeZone

For TimeZone (and ZonedTime and UTCTime):

%z
timezone offset in the format ±HHMM
%Ez
timezone offset in the format ±HH:MM
%Z
timezone name (or else offset in the format ±HHMM)
%EZ
timezone name (or else offset in the format ±HH:MM)

LocalTime

For LocalTime (and ZonedTime and UTCTime and UniversalTime):

%c
as dateTimeFmt locale (e.g. %a %b %e %H:%M:%S %Z %Y)

TimeOfDay

For TimeOfDay (and LocalTime and ZonedTime and UTCTime and UniversalTime):

%R
same as %H:%M
%T
same as %H:%M:%S
%X
as timeFmt locale (e.g. %H:%M:%S)
%r
as time12Fmt locale (e.g. %I:%M:%S %p)
%P
day-half of day from (amPm locale), converted to lowercase, am, pm
%p
day-half of day from (amPm locale), AM, PM
%H
hour of day (24-hour), 0-padded to two chars, 00 - 23
%k
hour of day (24-hour), space-padded to two chars, 0 - 23
%I
hour of day-half (12-hour), 0-padded to two chars, 01 - 12
%l
hour of day-half (12-hour), space-padded to two chars, 1 - 12
%M
minute of hour, 0-padded to two chars, 00 - 59
%S
second of minute (without decimal part), 0-padded to two chars, 00 - 60
%q
picosecond of second, 0-padded to twelve chars, 000000000000 - 999999999999.
%Q
decimal point and fraction of second, up to 12 second decimals, without trailing zeros. For a whole number of seconds, %Q omits the decimal point unless padding is specified.

UTCTime and ZonedTime

For UTCTime and ZonedTime:

%s
number of whole seconds since the Unix epoch. For times before the Unix epoch, this is a negative number. Note that in %s.%q and %s%Q the decimals are positive, not negative. For example, 0.9 seconds before the Unix epoch is formatted as -1.1 with %s%Q.

DayOfWeek

For DayOfWeek (and Day and LocalTime and ZonedTime and UTCTime and UniversalTime):

%u
day of week number for Week Date format, 1 (= Monday) - 7 (= Sunday)
%w
day of week number, 0 (= Sunday) - 6 (= Saturday)
%a
day of week, short form (snd from wDays locale), Sun - Sat
%A
day of week, long form (fst from wDays locale), Sunday - Saturday

Month

For Month (and Day and LocalTime and ZonedTime and UTCTime and UniversalTime):

%Y
year, no padding. Note %0Y and %_Y pad to four chars
%y
year of century, 0-padded to two chars, 00 - 99
%C
century, no padding. Note %0C and %_C pad to two chars
%B
month name, long form (fst from months locale), January - December
%b, %h
month name, short form (snd from months locale), Jan - Dec
%m
month of year, 0-padded to two chars, 01 - 12

Day

For Day (and LocalTime and ZonedTime and UTCTime and UniversalTime):

%D
same as %m/%d/%y
%F
same as %Y-%m-%d
%x
as dateFmt locale (e.g. %m/%d/%y)
%d
day of month, 0-padded to two chars, 01 - 31
%e
day of month, space-padded to two chars, 1 - 31
%j
day of year, 0-padded to three chars, 001 - 366
%f
century for Week Date format, no padding. Note %0f and %_f pad to two chars
%V
week of year for Week Date format, 0-padded to two chars, 01 - 53
%U
week of year where weeks start on Sunday (as sundayStartWeek), 0-padded to two chars, 00 - 53
%W
week of year where weeks start on Monday (as mondayStartWeek), 0-padded to two chars, 00 - 53

Duration types

The specifiers for DiffTime, NominalDiffTime, CalendarDiffDays, and CalendarDiffTime are semantically separate from the other types. Specifiers on negative time differences will generally be negative (think rem rather than mod).

NominalDiffTime and DiffTime

Note that a "minute" of DiffTime is simply 60 SI seconds, rather than a minute of civil time. Use NominalDiffTime to work with civil time, ignoring any leap seconds.

For NominalDiffTime and DiffTime:

%w
total whole weeks
%d
total whole days
%D
whole days of week
%h
total whole hours
%H
whole hours of day
%m
total whole minutes
%M
whole minutes of hour
%s
total whole seconds
%Es
total seconds, with decimal point and up to <width> (default 12) decimal places, without trailing zeros. For a whole number of seconds, %Es omits the decimal point unless padding is specified.
%0Es
total seconds, with decimal point and <width> (default 12) decimal places.
%S
whole seconds of minute
%ES
seconds of minute, with decimal point and up to <width> (default 12) decimal places, without trailing zeros. For a whole number of seconds, %ES omits the decimal point unless padding is specified.
%0ES
seconds of minute as two digits, with decimal point and <width> (default 12) decimal places.

CalendarDiffDays

For CalendarDiffDays (and CalendarDiffTime):

%y
total years
%b
total months
%B
months of year
%w
total weeks, not including months
%d
total days, not including months
%D
days of week

CalendarDiffTime

For CalendarDiffTime:

%h
total hours, not including months
%H
hours of day
%m
total minutes, not including months
%M
minutes of hour
%s
total whole seconds, not including months
%Es
total seconds, not including months, with decimal point and up to <width> (default 12) decimal places, without trailing zeros. For a whole number of seconds, %Es omits the decimal point unless padding is specified.
%0Es
total seconds, not including months, with decimal point and <width> (default 12) decimal places.
%S
whole seconds of minute
%ES
seconds of minute, with decimal point and up to <width> (default 12) decimal places, without trailing zeros. For a whole number of seconds, %ES omits the decimal point unless padding is specified.
%0ES
seconds of minute as two digits, with decimal point and <width> (default 12) decimal places.

UNIX-style parsing

parseTimeM Source #

Arguments

:: (MonadFail m, ParseTime t) 
=> Bool

Accept leading and trailing whitespace?

-> TimeLocale

Time locale.

-> String

Format string.

-> String

Input string.

-> m t

Return the time value, or fail if the input could not be parsed using the given format.

Parses a time value given a format string. Missing information will be derived from 1970-01-01 00:00 UTC (which was a Thursday). Supports the same %-codes as formatTime, including %-, %_ and %0 modifiers, however padding widths are not supported. Case is not significant in the input string. Some variations in the input are accepted:

%z %Ez
accepts any of ±HHMM or ±HH:MM.
%Z %EZ
accepts any string of letters, or any of the formats accepted by %z.
%0Y
accepts exactly four digits.
%0G
accepts exactly four digits.
%0C
accepts exactly two digits.
%0f
accepts exactly two digits.

For example, to parse a date in YYYY-MM-DD format, while allowing the month and date to have optional leading zeros (notice the - modifier used for %m and %d):

Prelude Data.Time> parseTimeM True defaultTimeLocale "%Y-%-m-%-d" "2010-3-04" :: Maybe Day
Just 2010-03-04

parseTimeMultipleM Source #

Arguments

:: (MonadFail m, ParseTime t) 
=> Bool

Accept leading and trailing whitespace?

-> TimeLocale

Time locale.

-> [(String, String)]

Pairs of (format string, input string).

-> m t

Return the time value, or fail if the input could not be parsed using the given format.

Parses a time value given a list of pairs of format and input. Resulting value is constructed from all provided specifiers.

parseTimeOrError Source #

Arguments

:: ParseTime t 
=> Bool

Accept leading and trailing whitespace?

-> TimeLocale

Time locale.

-> String

Format string.

-> String

Input string.

-> t

The time value.

Parse a time value given a format string. Fails if the input could not be parsed using the given format. See parseTimeM for details.

readSTime Source #

Arguments

:: ParseTime t 
=> Bool

Accept leading whitespace?

-> TimeLocale

Time locale.

-> String

Format string

-> ReadS t 

Parse a time value given a format string. See parseTimeM for details.

readPTime Source #

Arguments

:: ParseTime t 
=> Bool

Accept leading whitespace?

-> TimeLocale

Time locale.

-> String

Format string

-> ReadP t 

Parse a time value given a format string. See parseTimeM for details.

class ParseTime t Source #

The class of types which can be parsed given a UNIX-style time format string.

Minimal complete definition

parseTimeSpecifier, buildTime

Instances

Instances details
ParseTime CalendarDiffDays # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime Day # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime Month # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime DiffTime # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime NominalDiffTime # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime UTCTime # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime UniversalTime # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime CalendarDiffTime # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime TimeZone # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime TimeOfDay # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime LocalTime # 
Instance details

Defined in Data.Time.Format.Parse.Instances

ParseTime ZonedTime # 
Instance details

Defined in Data.Time.Format.Parse.Instances

Locale

data TimeLocale Source #

Constructors

TimeLocale 

Fields

defaultTimeLocale :: TimeLocale Source #

Locale representing American usage.

knownTimeZones contains only the ten time-zones mentioned in RFC 802 sec. 5: "UT", "GMT", "EST", "EDT", "CST", "CDT", "MST", "MDT", "PST", "PDT". Note that the parsing functions will regardless parse "UTC", single-letter military time-zones, and +HHMM format.

iso8601DateFormat :: Maybe String -> String Source #

Deprecated: use Data.Time.Format.ISO8601 functions instead

Construct format string according to ISO-8601.

The Maybe String argument allows to supply an optional time specification. E.g.:

iso8601DateFormat Nothing            == "%Y-%m-%d"           -- i.e. YYYY-MM-DD
iso8601DateFormat (Just "%H:%M:%S")  == "%Y-%m-%dT%H:%M:%S"  -- i.e. YYYY-MM-DDTHH:MM:SS

rfc822DateFormat :: String Source #

Format string according to RFC822.