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Top Forums Shell Programming and Scripting perl : number to date conversion in CSV file Post 302702617 by jim mcnamara on Tuesday 18th of September 2012 02:45:10 PM
Old 09-18-2012
Microsoft stores Excel dates as the number of days since January 0, 1900 (yes, Jan 0).
Humans think of it as December 31 1899. This is the Epoch for MS Excel.

Those numbers are days since the start of the Epoch date. Most UNIXes use Jan 1, 1970.

You are using the perl code correctly.

Code:
#!/bin/bash
get_date()
{
  perl -e '
   use DateTime::Format::Excel;     
   my $datetime = DateTime::Format::Excel->parse_datetime( ARGV[1] );     
   print $datetime->ymd(); '  "$1"
}

new_date=$( get_date 41148)

 

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DateTime::Format::Epoch::RataDie(3pm)			User Contributed Perl Documentation		     DateTime::Format::Epoch::RataDie(3pm)

NAME
DateTime::Format::Epoch::RataDie - Convert DateTimes to/from Rata Die SYNOPSIS
use DateTime::Format::Epoch::RataDie; my $dt = DateTime::Format::Epoch::RataDie->parse_datetime( $count ); DateTime::Format::Epoch::RataDie->format_datetime($dt); # $count my $formatter = DateTime::Format::Epoch::RataDie->new(); my $dt2 = $formatter->parse_datetime( $count ); $formatter->format_datetime($dt2); DESCRIPTION
This module can convert a DateTime object (or any object that can be converted to a DateTime object) to the Rata Die count. See DateTime::Format::Epoch::JD for a description. METHODS
Most of the methods are the same as those in DateTime::Format::Epoch. The only difference is the constructor. o new() Constructor of the formatter/parser object. It has no parameters. SUPPORT
Support for this module is provided via the datetime@perl.org email list. See http://lists.perl.org/ for more details. AUTHOR
Eugene van der Pijll <pijll@gmx.net> COPYRIGHT
Copyright (c) 2004 Eugene van der Pijll. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
DateTime datetime@perl.org mailing list perl v5.10.1 2007-12-03 DateTime::Format::Epoch::RataDie(3pm)
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