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Full Discussion: Convert Date Format
Top Forums Shell Programming and Scripting Convert Date Format Post 302877042 by Chubler_XL on Wednesday 27th of November 2013 06:29:04 PM
Old 11-27-2013
You could also use an array for the months but initialiser code is different for ksh and bash, which should work on older versions that don't support the substring expansion stuff.

I still like the perl solution as it gives you flexibility to user other date % formatters.

Code:
#!/bin/ksh
cur_date="${1:-2013/03/13 13:24:50}"
printf "Processing date: %s\n" "$cur_date"
set -A amn JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
IFS='/ '
set -- $cur_date
printf "%s-%s-%s %s\n" "$3" "${amn[10#$2-1]}" "$1" "$4"

 

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LEARN ABOUT MINIX

getdate

GETDATE(1)							   User Commands							GETDATE(1)

NAME

       getdate - AME

SYNOPSIS

       [-dv][-n dec][-f format] [ra dec sys] itype2otype [date and/or time]

DESCRIPTION

       Convert date and time between various formats

	      [-dv][-n dec][-f format] itype2otype @file

	      itype: nfd=ISOFITS fd=FITS, dt=yyyy.mmdd, hr=hh:mm:ss, deg=dd:mm:ss

	      jd=Julian  Date,	mjd=Modified Julian Date hjd=Heliocentric Julian Date, mhjd=Modified HJD ep=epoch, epj=Julian epoch, epb=Besselian
	      epoch lt=local time, ut=UT, ts=seconds since 1950-01-01 now=current time, ang=fractional degrees

	      otype: fd=FITS, dt=yyyy.mmdd, jd=Julian Date, mjd=Modified Julian Date

	      hjd=Heliocentric Julian Date, mhjd=Modified HJD  hr=hh:mm:ss,  deg=dd:mm:ss,  ang=fractional  degrees  ep=epoch,	epj=Julian  epoch,
	      epb=Besselian epoch ts=seconds since 1950-01-01, tsu=Unix sec, tsi=IRAF sec gst=Greenwich Sidereal Time, lst=Local Sidereal Time

	      @file: First one or two columns are in itype format ra dec sys:  Need for Heliocentric conversions

       -a: Append date to input file, if there is one

       -d: Print date without time

       -e: Print output as ET/TDT/TT converting from UT

       -f: Format for output number (C printf)

       -h hours: Longitude in hours, west positive

       -l degrees: Longitude in degrees, west positive

       -n: Number of decimal places in sec, epoch, JD

       -t: Print time without date

       -v: Verbose

getdate 3.8.4							     June 2012								GETDATE(1)
All times are GMT -4. The time now is 06:26 PM.
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