https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=16376 --- Comment #1 from David Cook <dcook@prosentient.com.au> --- You can easily verify this with the following Perl code: use DateTime; my $dt = DateTime->new( month => 9, year => 2015, day => 6, hour => 12, minute => 00, second => 00, time_zone => 'America/Santiago', ); print "DateTime:\n"; print $dt."\n"; print "Timezone:\n"; print $dt->time_zone()->name."\n"; print "Let's truncate...\n"; $dt->truncate( to => 'day'); TZ=America/Santiago perl issues.pl DateTime: 2015-09-06T12:00:00 Timezone: America/Santiago Let's truncate... Invalid local time for date in time zone: America/Santiago -- You are receiving this mail because: You are the assignee for the bug. You are watching all bug changes.