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Full Discussion: Date conversion and compare
Top Forums UNIX for Dummies Questions & Answers Date conversion and compare Post 302484433 by methyl on Friday 31st of December 2010 06:32:44 AM
Old 12-31-2010
What Operating System and version are you running?
What Shell are you using?
Do you have a High Level Programming Language available?
Do you have use of "perl", "awk" or other quick programming tools?

Further to Jim Mcnamara, what is the "some command" ? Is it something which can be changed to produce a date in a more usable format - preferably including the year too? Is it written in a language which could be used to convert the date? Is the date output from "some command" created on that very day (in which case the process could perhaps output a timestamp file)?

If the date format cannot be changed what is the precise format for a single digit day (leading zero?, month two spaces day?, month space day?).

To answer one of you questions in mainstream "find" the effect of "-older" is achieved by negating "-newer". If your date actually comes from "ls" command we could of course refer to the file itself not a directory listing of the file.


Example of one way to convert character month to numeric month:
This script is an example which also tests itself for every possible month name. There are other more clever Shell techniques available which are less portable.
Code:
for MMM in "Jan" "Feb" "Mar" "Apr" "May" "Jun"\
           "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"
do
        case "${MMM}" in
                "Jan")  MM="01" ;;
                "Feb")  MM="02" ;;
                "Mar")  MM="03" ;;
                "Apr")  MM="04" ;;
                "May")  MM="05" ;;
                "Jun")  MM="06" ;;
                "Jul")  MM="07" ;;
                "Aug")  MM="08" ;;
                "Sep")  MM="09" ;;
                "Oct")  MM="10" ;;
                "Nov")  MM="11" ;;
                "Dec")  MM="12" ;;
        esac
        #
        echo "${MMM}:${MM}"
done

Jan:01
Feb:02
Mar:03
Apr:04
May:05
Jun:06
Jul:07
Aug:08
Sep:09
Oct:10
Nov:11
Dec:12

This User Gave Thanks to methyl For This Post:
bhavinshah15
 

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LEARN ABOUT OSX

datetime::locale::en_bz

DateTime::Locale::en_BZ(3)				User Contributed Perl Documentation				DateTime::Locale::en_BZ(3)

NAME

       DateTime::Locale::en_BZ

SYNOPSIS

	 use DateTime;

	 my $dt = DateTime->now( locale => 'en_BZ' );
	 print $dt->month_name();

DESCRIPTION

       This is the DateTime locale package for English Belize.

DATA

       This locale inherits from the DateTime::Locale::en locale.

       It contains the following data.

   Days
       Wide (format)

	 Monday
	 Tuesday
	 Wednesday
	 Thursday
	 Friday
	 Saturday
	 Sunday

       Abbreviated (format)

	 Mon
	 Tue
	 Wed
	 Thu
	 Fri
	 Sat
	 Sun

       Narrow (format)

	 M
	 T
	 W
	 T
	 F
	 S
	 S

       Wide (stand-alone)

	 Monday
	 Tuesday
	 Wednesday
	 Thursday
	 Friday
	 Saturday
	 Sunday

       Abbreviated (stand-alone)

	 Mon
	 Tue
	 Wed
	 Thu
	 Fri
	 Sat
	 Sun

       Narrow (stand-alone)

	 M
	 T
	 W
	 T
	 F
	 S
	 S

   Months
       Wide (format)

	 January
	 February
	 March
	 April
	 May
	 June
	 July
	 August
	 September
	 October
	 November
	 December

       Abbreviated (format)

	 Jan
	 Feb
	 Mar
	 Apr
	 May
	 Jun
	 Jul
	 Aug
	 Sep
	 Oct
	 Nov
	 Dec

       Narrow (format)

	 J
	 F
	 M
	 A
	 M
	 J
	 J
	 A
	 S
	 O
	 N
	 D

       Wide (stand-alone)

	 January
	 February
	 March
	 April
	 May
	 June
	 July
	 August
	 September
	 October
	 November
	 December

       Abbreviated (stand-alone)

	 Jan
	 Feb
	 Mar
	 Apr
	 May
	 Jun
	 Jul
	 Aug
	 Sep
	 Oct
	 Nov
	 Dec

       Narrow (stand-alone)

	 J
	 F
	 M
	 A
	 M
	 J
	 J
	 A
	 S
	 O
	 N
	 D

   Quarters
       Wide (format)

	 1st quarter
	 2nd quarter
	 3rd quarter
	 4th quarter

       Abbreviated (format)

	 Q1
	 Q2
	 Q3
	 Q4

       Narrow (format)

	 1
	 2
	 3
	 4

       Wide (stand-alone)

	 1st quarter
	 2nd quarter
	 3rd quarter
	 4th quarter

       Abbreviated (stand-alone)

	 Q1
	 Q2
	 Q3
	 Q4

       Narrow (stand-alone)

	 1
	 2
	 3
	 4

   Eras
       Wide

	 Before Christ
	 Anno Domini

       Abbreviated

	 BC
	 AD

       Narrow

	 B
	 A

   Date Formats
       Full

	  2008-02-05T18:30:30 = 05 February 2008
	  1995-12-22T09:05:02 = 22 December 1995
	 -0010-09-15T04:44:23 = 15 September -10

       Long

	  2008-02-05T18:30:30 = 05 February 2008
	  1995-12-22T09:05:02 = 22 December 1995
	 -0010-09-15T04:44:23 = 15 September -10

       Medium

	  2008-02-05T18:30:30 = 05-Feb-2008
	  1995-12-22T09:05:02 = 22-Dec-1995
	 -0010-09-15T04:44:23 = 15-Sep--10

       Short

	  2008-02-05T18:30:30 = 05/02/08
	  1995-12-22T09:05:02 = 22/12/95
	 -0010-09-15T04:44:23 = 15/09/-10

       Default

	  2008-02-05T18:30:30 = 05-Feb-2008
	  1995-12-22T09:05:02 = 22-Dec-1995
	 -0010-09-15T04:44:23 = 15-Sep--10

   Time Formats
       Full

	  2008-02-05T18:30:30 = 18:30:30 UTC
	  1995-12-22T09:05:02 = 09:05:02 UTC
	 -0010-09-15T04:44:23 = 04:44:23 UTC

       Long

	  2008-02-05T18:30:30 = 18:30:30 UTC
	  1995-12-22T09:05:02 = 09:05:02 UTC
	 -0010-09-15T04:44:23 = 04:44:23 UTC

       Medium

	  2008-02-05T18:30:30 = 18:30:30
	  1995-12-22T09:05:02 = 09:05:02
	 -0010-09-15T04:44:23 = 04:44:23

       Short

	  2008-02-05T18:30:30 = 18:30
	  1995-12-22T09:05:02 = 09:05
	 -0010-09-15T04:44:23 = 04:44

       Default

	  2008-02-05T18:30:30 = 18:30:30
	  1995-12-22T09:05:02 = 09:05:02
	 -0010-09-15T04:44:23 = 04:44:23

   Datetime Formats
       Full

	  2008-02-05T18:30:30 = 05 February 2008 18:30:30 UTC
	  1995-12-22T09:05:02 = 22 December 1995 09:05:02 UTC
	 -0010-09-15T04:44:23 = 15 September -10 04:44:23 UTC

       Long

	  2008-02-05T18:30:30 = 05 February 2008 18:30:30 UTC
	  1995-12-22T09:05:02 = 22 December 1995 09:05:02 UTC
	 -0010-09-15T04:44:23 = 15 September -10 04:44:23 UTC

       Medium

	  2008-02-05T18:30:30 = 05-Feb-2008 18:30:30
	  1995-12-22T09:05:02 = 22-Dec-1995 09:05:02
	 -0010-09-15T04:44:23 = 15-Sep--10 04:44:23

       Short

	  2008-02-05T18:30:30 = 05/02/08 18:30
	  1995-12-22T09:05:02 = 22/12/95 09:05
	 -0010-09-15T04:44:23 = 15/09/-10 04:44

       Default

	  2008-02-05T18:30:30 = 05-Feb-2008 18:30:30
	  1995-12-22T09:05:02 = 22-Dec-1995 09:05:02
	 -0010-09-15T04:44:23 = 15-Sep--10 04:44:23

   Available Formats
       d (d)

	  2008-02-05T18:30:30 = 5
	  1995-12-22T09:05:02 = 22
	 -0010-09-15T04:44:23 = 15

       EEEd (d EEE)

	  2008-02-05T18:30:30 = 5 Tue
	  1995-12-22T09:05:02 = 22 Fri
	 -0010-09-15T04:44:23 = 15 Sat

       Hm (H:mm)

	  2008-02-05T18:30:30 = 18:30
	  1995-12-22T09:05:02 = 9:05
	 -0010-09-15T04:44:23 = 4:44

       hm (h:mm a)

	  2008-02-05T18:30:30 = 6:30 PM
	  1995-12-22T09:05:02 = 9:05 AM
	 -0010-09-15T04:44:23 = 4:44 AM

       Hms (H:mm:ss)

	  2008-02-05T18:30:30 = 18:30:30
	  1995-12-22T09:05:02 = 9:05:02
	 -0010-09-15T04:44:23 = 4:44:23

       hms (h:mm:ss a)

	  2008-02-05T18:30:30 = 6:30:30 PM
	  1995-12-22T09:05:02 = 9:05:02 AM
	 -0010-09-15T04:44:23 = 4:44:23 AM

       M (L)

	  2008-02-05T18:30:30 = 2
	  1995-12-22T09:05:02 = 12
	 -0010-09-15T04:44:23 = 9

       Md (M/d)

	  2008-02-05T18:30:30 = 2/5
	  1995-12-22T09:05:02 = 12/22
	 -0010-09-15T04:44:23 = 9/15

       MEd (E, M/d)

	  2008-02-05T18:30:30 = Tue, 2/5
	  1995-12-22T09:05:02 = Fri, 12/22
	 -0010-09-15T04:44:23 = Sat, 9/15

       MMdd (dd/MM)

	  2008-02-05T18:30:30 = 05/02
	  1995-12-22T09:05:02 = 22/12
	 -0010-09-15T04:44:23 = 15/09

       MMM (LLL)

	  2008-02-05T18:30:30 = Feb
	  1995-12-22T09:05:02 = Dec
	 -0010-09-15T04:44:23 = Sep

       MMMd (MMM d)

	  2008-02-05T18:30:30 = Feb 5
	  1995-12-22T09:05:02 = Dec 22
	 -0010-09-15T04:44:23 = Sep 15

       MMMEd (E, MMM d)

	  2008-02-05T18:30:30 = Tue, Feb 5
	  1995-12-22T09:05:02 = Fri, Dec 22
	 -0010-09-15T04:44:23 = Sat, Sep 15

       MMMMd (MMMM d)

	  2008-02-05T18:30:30 = February 5
	  1995-12-22T09:05:02 = December 22
	 -0010-09-15T04:44:23 = September 15

       MMMMEd (E, MMMM d)

	  2008-02-05T18:30:30 = Tue, February 5
	  1995-12-22T09:05:02 = Fri, December 22
	 -0010-09-15T04:44:23 = Sat, September 15

       ms (mm:ss)

	  2008-02-05T18:30:30 = 30:30
	  1995-12-22T09:05:02 = 05:02
	 -0010-09-15T04:44:23 = 44:23

       y (y)

	  2008-02-05T18:30:30 = 2008
	  1995-12-22T09:05:02 = 1995
	 -0010-09-15T04:44:23 = -10

       yM (M/yyyy)

	  2008-02-05T18:30:30 = 2/2008
	  1995-12-22T09:05:02 = 12/1995
	 -0010-09-15T04:44:23 = 9/-010

       yMEd (EEE, M/d/yyyy)

	  2008-02-05T18:30:30 = Tue, 2/5/2008
	  1995-12-22T09:05:02 = Fri, 12/22/1995
	 -0010-09-15T04:44:23 = Sat, 9/15/-010

       yMMM (MMM y)

	  2008-02-05T18:30:30 = Feb 2008
	  1995-12-22T09:05:02 = Dec 1995
	 -0010-09-15T04:44:23 = Sep -10

       yMMMEd (EEE, MMM d, y)

	  2008-02-05T18:30:30 = Tue, Feb 5, 2008
	  1995-12-22T09:05:02 = Fri, Dec 22, 1995
	 -0010-09-15T04:44:23 = Sat, Sep 15, -10

       yMMMM (MMMM y)

	  2008-02-05T18:30:30 = February 2008
	  1995-12-22T09:05:02 = December 1995
	 -0010-09-15T04:44:23 = September -10

       yQ (Q yyyy)

	  2008-02-05T18:30:30 = 1 2008
	  1995-12-22T09:05:02 = 4 1995
	 -0010-09-15T04:44:23 = 3 -010

       yQQQ (QQQ y)

	  2008-02-05T18:30:30 = Q1 2008
	  1995-12-22T09:05:02 = Q4 1995
	 -0010-09-15T04:44:23 = Q3 -10

       yyyyMMMM (MMMM y)

	  2008-02-05T18:30:30 = February 2008
	  1995-12-22T09:05:02 = December 1995
	 -0010-09-15T04:44:23 = September -10

   Miscellaneous
       Prefers 24 hour time?

       Yes

       Local first day of the week

       Monday

SUPPORT

       See DateTime::Locale.

AUTHOR

       Dave Rolsky <autarch@urth.org>

COPYRIGHT

       Copyright (c) 2008 David Rolsky. All rights reserved. This program is free software; you can redistribute it and/or modify it under the
       same terms as Perl itself.

       This module was generated from data provided by the CLDR project, see the LICENSE.cldr in this distribution for details on the CLDR data's
       license.

perl v5.16.2							    2013-08-25						DateTime::Locale::en_BZ(3)
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