SYNOPSIS
dconv [OPTION]... [DATE/TIME]...DESCRIPTION
Convert DATE/TIMEs between calendrical systems. If DATE/TIME is omitted date/times are read from stdin.
DATE/TIME can also be one of the following specials
- `now' interpreted as the current (UTC) time stamp
- `time' the time part of the current (UTC) time stamp
- `today' the current date (according to UTC)
- `tomo[rrow]' tomorrow's date (according to UTC)
- `y[ester]day' yesterday's date (according to UTC)
Recognized OPTIONs:
- -h, --help
- Print help and exit
- -V, --version
- Print version and exit
- -q, --quiet
- Suppress message about date/time and duration parser errors and fix-ups. The default is to print a warning or the fixed up value and return error code 2.
- -f, --format=STRING
- Output format. This can either be a specifier string (similar to strftime()'s FMT) or the name of a calendar.
- -i, --input-format=STRING...
- Input format, can be used multiple times. Each date/time will be passed to the input format parsers in the order they are given, if a date/time can be read successfully with a given input format specifier string, that value will be used.
- --default=DT
- For underspecified input use DT as a fallback to fill in missing fields. Must be a date/time in ISO8601 format. If omitted the default value is the current date/time.
- -e, --backslash-escapes
- Enable interpretation of backslash escapes in the output and input format specifier strings.
- -S, --sed-mode
- Copy parts from the input before and after a matching date/time. Note that all occurrences of date/times within a line will be processed.
- --from-zone=ZONE
- Interpret dates on stdin or the command line as coming from the time zone ZONE.
- -z, --zone=ZONE
- Convert dates printed on stdout to time zone ZONE, default: UTC.
FORMAT SPECS
Format specs in dateutils are similar to posix' strftime().
However, due to a broader range of supported calendars dateutils must employ different rules.
Date specs:
%a The abbreviated weekday name
%A The full weekday name
%_a The weekday name shortened to a single character (MTWRFAS)
%b The abbreviated month name
%B The full month name
%_b The month name shortened to a single character (FGHJKMNQUVXZ)
%c The count of the weekday within the month (range 00 to 05)
%C The count of the weekday within the year (range 00 to 53)
%d The day of the month, 2 digits (range 00 to 31)
%D The day of the year, 3 digits (range 000 to 366)
%F Equivalent to %Y-%m-%d (ymd's canonical format)
%j Equivalent to %D
%m The month in the current calendar (range 00 to 19)
%Q The quarter of the year (range Q1 to Q4)
%q The number of the quarter (range 01 to 04)
%s The number of seconds since the Epoch.
%u The weekday as number (range 01 to 07, Sunday being 07)
%U The week count, day of week is Sun (range 00 to 53)
%V The ISO week count, day of week is Mon (range 01 to 53)
%w The weekday as number (range 00 to 06, Sunday being 00)
%W The week count, day of week is Mon (range 00 to 53)
%y The year without a century (range 00 to 99)
%Y The year including the century
%Z The zone offset in hours and minutes (HH:MM) with
a preceding sign (+ for offsets east of UTC, - for offsets
west of UTC)
%Od The day as roman numerals %Om The month as roman numerals %Oy The two digit year as roman numerals %OY The year including the century as roman numerals
%rs In time systems whose Epoch is different from the unix Epoch, this
selects the number of seconds since then.
%rY In calendars with years that don't coincide with the Gregorian
years, this selects the calendar's year.
%dth The day of the month as an ordinal number, 1st, 2nd, 3rd, etc. %mth The month of the year as an ordinal number, 1st, 2nd, 3rd, etc.
%db The business day of the month (since last month's ultimo) %dB Number of business days until this month's ultimo
Time specs:
%H The hour of the day using a 24h clock, 2 digits (range 00 to 23) %I The hour of the day using a 12h clock, 2 digits (range 01 to 12) %M The minute (range 00 to 59) %N The nanoseconds (range 000000000 to 999999999) %p The string AM or PM, noon is PM and midnight is AM. %P Like %p but in lowercase %S The (range 00 to 60, 60 is for leap seconds) %T Equivalent to %H:%M:%S
General specs:
%n A newline character %t A tab character %% A literal % character
Modifiers:
%O Modifier to turn decimal numbers into Roman numerals %r Modifier to turn units into real units th Suffix, read and print ordinal numbers b Suffix, treat days as business days
By design dates before 1601-01-01 are not supported.
For conformity here is a list of calendar designators and their corresponding format string:
ymd %Y-%m-%d ymcw %Y-%m-%c-%w ywd %rY-W%V-%u bizda %Y-%m-%db lilian n/a ldn n/a julian n/a jdn n/a
These designators can be used as output format string, moreover, @code{lilian}/@code{ldn} and @code{julian}/@code{jdn} can also be used as input format string.
EXAMPLES
$ dconv 2012-03-01 2012-03-01 $
$ dconv -i "%d/%b/%y" 01/Mar/12 2012-03-01 $
$ dconv -f "%d/%b/%y" 2012-03-01 01/Mar/12 $
$ dconv -f "%d/%b/%y" -i "%OY %Om %Od" "MCMXCVIII IX XVII" 17/Sep/98 $
$ dconv 12:03:01 12:03:01 $
$ dconv -i "%I:%M:%S %p" "11:22:33 PM" 23:22:33 $
$ dconv '2012-03-01 00:00:00' 2012-03-01T00:00:00 $
$ dconv 2012-03-01T12:34:56 2012-03-01T12:34:56 $
$ dconv --zone America/Chicago <<EOF 2012-03-01T07:05:06 2012-03-01T08:12:34 2012-03-11T01:05:06 2012-03-11T02:05:06 2012-03-11T07:05:06 2012-03-11T08:05:06 2012-03-11T17:05:06 EOF 2012-03-01T01:05:06 2012-03-01T02:12:34 2012-03-10T19:05:06 2012-03-10T20:05:06 2012-03-11T01:05:06 2012-03-11T03:05:06 2012-03-11T12:05:06 $
$ dconv --from-zone America/Chicago <<EOF 2012-03-01T01:05:06 2012-03-01T02:12:34 2012-03-10T19:05:06 2012-03-10T20:05:06 2012-03-11T01:05:06 2012-03-11T03:05:06 2012-03-11T12:05:06 EOF 2012-03-01T07:05:06 2012-03-01T08:12:34 2012-03-11T01:05:06 2012-03-11T02:05:06 2012-03-11T07:05:06 2012-03-11T08:05:06 2012-03-11T17:05:06 $
$ dconv --from-zone America/Chicago -z Europe/Berlin '2012-03-01 12:00' -i '%F %H:%M' -f '%F %T' 2012-03-01 19:00:00 $