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DATEADD(1)			 User Commands			    DATEADD(1)

NAME
       dateadd - Add DURATION to DATE/TIME and print the result.

SYNOPSIS
       dateadd [OPTION]...  [DATE/TIME]	[DURATION]

DESCRIPTION
       Add  DURATION to	DATE/TIME and print the	result.	 If DATE/TIME is omit-
       ted but DURATION	is given, read a list of DATE/TIMEs  from  stdin.   If
       DURATION	 is  omitted  but DATE/TIME is given, read a list of DURATIONs
       from stdin.

       Durations are specified as nY, nMO, nW, or nD for years,	months,	weeks,
       or  days	 respectively,	or nH, nM, nS for hours, minutes, and seconds,
       where N is a (possibly negative)	number.	 The unit symbols can be writ-
       ten  lower-case	as well	(y, mo,	w, d, h, m, s) and the unit symbol `d'
       can be omitted.

       Note that duration addition is not commutative!
	 2000-03-30 +1mo +1d ->	2000-05-01
	 2000-03-30 +1d	+1mo ->	2000-04-30

       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 in-
	      put format specifier string, that	value will be used.

       -b, --base=DT
	      For underspecified input use DT as a fallback to fill in missing
	      fields.	Also  used for ambiguous format	specifiers to position
	      their range on the absolute time line.  Must be a	 date/time  in
	      ISO8601 format.  If omitted defaults to the current date/time.

       -e, --backslash-escapes
	      Enable interpretation of backslash escapes in the	output and in-
	      put 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.

       --locale=LOCALE
	      Format results according to LOCALE, this would only affect month
	      and weekday names.

       --from-locale=LOCALE
	      Interpret	 dates on stdin	or the command line as coming from the
	      locale LOCALE, this would	only affect month and weekday names as
	      input formats have to be specified explicitly.

       --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)
	 %g  ISO week date year	without	the century (range 00 to 99)
	 %G  ISO week date year	including the century
	 %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
	 %_y The year shortened	to a single digit
	 %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	corre-
       sponding	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.

SPECIFYING DURATIONS
       Some tools ("dateadd", "dateseq") need durations	as their input.	 Dura-
       tions  are  generally  incompatible  with input formats as specified by
       "-i|--input-format" and (at the moment) the input syntax	is fixed.

       The general format is "+-Nunit" where "+" or "-"	is  the	 sign,	"N"  a
       number, and "unit" the unit as discussed	below.

       Units:
	 s  seconds
	 m  minutes
	 h  hours
	 rs real-life seconds, as in including leap  transitions

	 d  days
	 b  business days
	 mo months
	 y  years

EXAMPLES
	 $ dateadd 2012-03-01 1d
	 2012-03-02
	 $

	 $ dateadd 2012-03-01 1m
	 2012-04-01
	 $

	 $ dateadd 2012-03-31 1m
	 2012-04-30
	 $

	 $ dateadd 2w2d	<<EOF
	 2012-03-01
	 2012-03-02
	 2012-03-04
	 2012-03-08
	 2012-03-16
	 EOF
	 2012-03-17
	 2012-03-18
	 2012-03-20
	 2012-03-24
	 2012-04-01
	 $

	 $ dateadd 10:01:00 1h6m
	 11:07:00
	 $

	 $ dateadd 10:01:00 -1h6m
	 08:55:00
	 $

	 $ dateadd 10:01:00 3605s
	 11:01:05
	 $

AUTHOR
       Written by Sebastian Freundt <freundt@fresse.org>

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

SEE ALSO
       The  full  documentation	for dateadd is maintained as a Texinfo manual.
       If the info and dateadd programs	are properly installed at  your	 site,
       the command

	      info (dateutils)dateadd

       should give you access to the complete manual.

dateutils 0.4.1			 December 2016			    DATEADD(1)

NAME | SYNOPSIS | DESCRIPTION | FORMAT SPECS | SPECIFYING DURATIONS | EXAMPLES | AUTHOR | REPORTING BUGS | SEE ALSO

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