Time formats

The parse-time and format-time functions accept format codes that derive from GNU strftime with some extensions, as follows:

%% - literal "%"

%z - RFC 822/ISO 8601:1988 style numeric time zone (e.g., "-0600" or "+0100")

%N - ISO 8601 style numeric time zone (e.g., "-06:00" or "+01:00") /EXTENSION/

%Z - timezone name

%c - The preferred calendar time representation for the current locale. As 'dateTimeFmt' locale (e.g. %a %b %e %H:%M:%S %Z %Y)

%R - same as %H:%M

%T - same as %H:%M:%S

%X - The preferred time of day representation for the current locale. As 'timeFmt' locale (e.g. %H:%M:%S)

%r - The complete calendar time using the AM/PM format of the current locale. 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"

%v - microsecond of second, 0-padded to six chars, "000000"–"999999". /EXTENSION/

%Q - decimal point and fraction of second, up to 6 second decimals, without trailing zeros. For a whole number of seconds, %Q produces the empty string. /EXTENSION/

%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.

%D - same as %m\/%d\/%y

%F - same as %Y-%m-%d

%x - as 'dateFmt' locale (e.g. %m\/%d\/%y)

%Y - year, no padding.

%y - year of century, 0-padded to two chars, "00"–"99"

%C - century, no padding.

%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"

%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"

%G - year for Week Date format, no padding.

%g - year of century for Week Date format, 0-padded to two chars, "00"–"99"

%f - century for Week Date format, no padding. /EXTENSION/

%V - week of year for Week Date format, 0-padded to two chars, "01"–"53"

%u - day of week for Week Date format, "1"–"7"

%a - day of week, short form ('snd' from 'wDays' locale), "Sun"–"Sat"

%A - day of week, long form ('fst' from 'wDays' locale), "Sunday"–"Saturday"

%U - week of year where weeks start on Sunday (as 'sundayStartWeek'), 0-padded to two chars, "00"–"53"

%w - day of week number, "0" (= Sunday) – "6" (= Saturday)

%W - week of year where weeks start on Monday (as 'Data.Thyme.Calendar.WeekdayOfMonth.mondayStartWeek'), 0-padded to two chars, "00"–"53"

Note: %q (picoseconds, zero-padded) does not work properly so not documented here.

The default format is a UTC ISO8601 date+time format: "%Y-%m-%dT%H:%M:%SZ", as accepted by the time function. While the time object internally supports up to microsecond resolution, values returned from the Pact interpreter as JSON will be serialized with the default format. When higher resolution is desired, explicitly format times with %v and related codes.