Provided by: dateutils_0.3.1-1.1_amd64 bug

NAME

       dseq - Generate a sequence of date/times from FIRST to LAST, optionally in steps of

SYNOPSIS

       dseq [OPTION]... FIRST [[INCREMENT] LAST]

DESCRIPTION

       Generate  a  sequence  of  date/times from FIRST to LAST, optionally in steps of INCREMENT
       (which defaults to `1d').

       If LAST is omitted it defaults to `now' if FIRST is a date/time, or `today' if FIRST is  a
       date, or `time' if FIRST is a time.

       The  values  of  FIRST and LAST are always inclusive and no date/times before FIRST and no
       date/times after LAST will be printed.

       Negative INCREMENTs must be given, i.e. if FIRST is newer than LAST.

       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.

       -e, --backslash-escapes
              Enable interpretation of backslash escapes in the output and input format specifier
              strings.

       -s, --skip=STRING...
              Skip  weekdays  specified  by  STRING.   STRING  can be a single weekday (Mon, Tue,
              etc.), and to skip several days the --skip  option  can  be  used  multiple  times.
              STRING  can  also  be  a  comma-separated  list  of  weekday names, or `ss' to skip
              weekends (sat+sun) altogether.  STRING can also contain date  ranges  like  `mo-we'
              for monday to wednesday.

       --alt-inc=STRING
              Alternative  increment  to  use  when  a date is hit that is skipped as per --skip.
              This increment will be applied until a non-skipped date is  reached.   The  special
              case  `0'  (default) deactivates alternative incrementing.  A useful value could be
              `1d' for increasing sequences and `-1d' for decreasing sequences, so if  a  skipped
              date is encountered the next non-skipped date after/before will be used.

       --compute-from-last
              Compute  a  start  value from LAST using INCREMENT.  This option has an effect only
              when INCREMENT is not a divisor of the duration between FIRST and  LAST.   In  such
              case,  an alternative FIRST will be computed by consecutively subtracting INCREMENT
              from LAST until FIRST is hit or crossed.

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.

SPECIFYING DURATIONS

       Some  tools  ("dadd",  "dseq")  need  durations  as  their input.  Durations 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

         $ dseq 2012-02-01 2012-03-01
         2012-02-01
         2012-02-02
         2012-02-03
         2012-02-04
         2012-02-05
         2012-02-06
         2012-02-07
         2012-02-08
         2012-02-09
         2012-02-10
         2012-02-11
         2012-02-12
         2012-02-13
         2012-02-14
         2012-02-15
         2012-02-16
         2012-02-17
         2012-02-18
         2012-02-19
         2012-02-20
         2012-02-21
         2012-02-22
         2012-02-23
         2012-02-24
         2012-02-25
         2012-02-26
         2012-02-27
         2012-02-28
         2012-02-29
         2012-03-01
         $

         $ dseq 2001-02-03 2001-03-03 --skip sat -f "%F %a"
         2001-02-04 Sun
         2001-02-05 Mon
         2001-02-06 Tue
         2001-02-07 Wed
         2001-02-08 Thu
         2001-02-09 Fri
         2001-02-11 Sun
         2001-02-12 Mon
         2001-02-13 Tue
         2001-02-14 Wed
         2001-02-15 Thu
         2001-02-16 Fri
         2001-02-18 Sun
         2001-02-19 Mon
         2001-02-20 Tue
         2001-02-21 Wed
         2001-02-22 Thu
         2001-02-23 Fri
         2001-02-25 Sun
         2001-02-26 Mon
         2001-02-27 Tue
         2001-02-28 Wed
         2001-03-01 Thu
         2001-03-02 Fri
         $

         $ dseq --compute-from-last 2001-02-03 1 2001-03-03 --skip sat -f "%F %a"
         2001-02-04 Sun
         2001-02-05 Mon
         2001-02-06 Tue
         2001-02-07 Wed
         2001-02-08 Thu
         2001-02-09 Fri
         2001-02-11 Sun
         2001-02-12 Mon
         2001-02-13 Tue
         2001-02-14 Wed
         2001-02-15 Thu
         2001-02-16 Fri
         2001-02-18 Sun
         2001-02-19 Mon
         2001-02-20 Tue
         2001-02-21 Wed
         2001-02-22 Thu
         2001-02-23 Fri
         2001-02-25 Sun
         2001-02-26 Mon
         2001-02-27 Tue
         2001-02-28 Wed
         2001-03-01 Thu
         2001-03-02 Fri
         $

         $ dseq 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-06 Tue
         2001-02-12 Mon
         2001-02-15 Thu
         2001-02-18 Sun
         2001-02-21 Wed
         2001-02-27 Tue
         $

         $ dseq --compute-from-last 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-04 Sun
         2001-02-07 Wed
         2001-02-13 Tue
         2001-02-19 Mon
         2001-02-22 Thu
         2001-02-25 Sun
         2001-02-28 Wed
         $

         $ dseq 2001-02-05 4 2001-03-04 -f "%F %a"
         2001-02-05 Mon
         2001-02-09 Fri
         2001-02-13 Tue
         2001-02-17 Sat
         2001-02-21 Wed
         2001-02-25 Sun
         2001-03-01 Thu
         $

         $ dseq --compute-from-last 2001-02-05 4 2001-03-04 -f "%F %a"
         2001-02-08 Thu
         2001-02-12 Mon
         2001-02-16 Fri
         2001-02-20 Tue
         2001-02-24 Sat
         2001-02-28 Wed
         2001-03-04 Sun
         $

         $ dseq --alt-inc 1d 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-04 Sun
         2001-02-07 Wed
         2001-02-11 Sun
         2001-02-14 Wed
         2001-02-18 Sun
         2001-02-21 Wed
         2001-02-25 Sun
         2001-02-28 Wed
         $

         $ dseq --compute-from-last --alt-inc 1d 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-04 Sun
         2001-02-07 Wed
         2001-02-11 Sun
         2001-02-14 Wed
         2001-02-18 Sun
         2001-02-21 Wed
         2001-02-25 Sun
         2001-02-28 Wed
         $

         $ dseq 2001-01-01 2d 2001-01-08
         2001-01-01
         2001-01-03
         2001-01-05
         2001-01-07
         $

         $ dseq --compute-from-last 2001-01-01 2d 2001-01-08
         2001-01-02
         2001-01-04
         2001-01-06
         2001-01-08
         $

         $ dseq 2001-01-08 -2d 2001-01-01
         2001-01-08
         2001-01-06
         2001-01-04
         2001-01-02
         $

         $ dseq --compute-from-last 2001-01-08 -2d 2001-01-01
         2001-01-07
         2001-01-05
         2001-01-03
         2001-01-01
         $

         $ dseq 10:00:00 12m 11:20:00
         10:00:00
         10:12:00
         10:24:00
         10:36:00
         10:48:00
         11:00:00
         11:12:00
         $

         $ dseq --compute-from-last 10:00:00 12m 11:20:00
         10:08:00
         10:20:00
         10:32:00
         10:44:00
         10:56:00
         11:08:00
         11:20:00
         $

         $ dseq 11:20:00 -12m 10:00:00
         11:20:00
         11:08:00
         10:56:00
         10:44:00
         10:32:00
         10:20:00
         10:08:00
         $

         $ dseq --compute-from-last 11:20:00 -12m 10:00:00
         11:12:00
         11:00:00
         10:48:00
         10:36:00
         10:24:00
         10:12:00
         10:00:00
         $

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 dseq is maintained as a Texinfo manual.  If the info  and  dseq
       programs are properly installed at your site, the command

              info (dateutils)dseq

       should give you access to the complete manual.