Ubuntu Manpage: dconv - Convert DATE/TIMEs between calendrical systems.

NAME

       dconv - Convert DATE/TIMEs between calendrical systems.

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
         $

AUTHOR

       Written by Sebastian Freundt <freundt@fresse.org>

REPORTING BUGS

       Report bugs to: https://github.com/hroptatyr/dateutils/issues