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This queue is for tickets about the DateTime CPAN distribution.

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The Basics
Id: 98733
Status: resolved
Priority: 0/
Queue: DateTime
People
Owner: Nobody in particular
Requestors: bbkr [...] post.pl
Cc:
AdminCc:
Bug Information
Severity: (no value)
Broken in: (no value)
Fixed in: 1.14

History Show all quoted text
  Tue Sep 09 08:46:54 2014 bbkr [...] post.pl - Ticket created
Method subtract_datetime_absolute is not consistent with epoch difference: perl -e 'use DateTime; my $d1 = DateTime->new( time_zone => 'UTC', year => 2000); my $d2 = DateTime->new( time_zone => 'UTC', year => 2100); print "subtract: " . $d1->subtract_datetime_absolute($d2)->in_units("seconds") . $/; print "epochs: " . ($d1->epoch - $d2->epoch) . $/' subtract: -3155760003 epochs: -3155760000
  Tue Sep 09 09:03:46 2014 bbkr [...] post.pl - Correspondence added
From: bbkr [...] post.pl
After some research i think it is related to leap seconds - 3 corrections were made since 2000: http://en.wikipedia.org/wiki/Leap_second#mediaviewer/File:Leapsecond.ut1-utc.svg Worth adding to documentation in caveats section.
  Sat Sep 13 15:50:07 2014 DROLSKY [...] cpan.org - Subject changed from (no value) to 'subtract_datetime_absolute does not produce the same results as subtracting two epochs'
  Sat Jan 03 20:33:07 2015 DROLSKY [...] cpan.org - Status changed from 'new' to 'resolved'
  Sat Jan 03 20:33:14 2015 DROLSKY [...] cpan.org - Fixed in 1.14 added