Error Export Agenda with AGENDA_EXPORT_FIX_TZ for Holidays

[comaiteseb]

Bug

When I'm exporting the calendar in any format (ics, caldav...) if I set a value on the AGENDA_EXPORT_FIX_TZ parameter, the exported date is 1969-12-31

Environment Version

15.0 & 16.0

Environment OS

Linux

Environment Web server

Apache

Environment PHP

php 7.4

Environment Database

Mysql 8

Environment URL(s)

No response

Expected and actual behavior

No response

Steps to reproduce the behavior

No response

Attached files

There is a solution with a patch:
diff --git a/htdocs/comm/action/class/actioncomm.class.php b/htdocs/comm/action/class/actioncomm.class.php
index a5c8a11..c5d3fc5 100644
--- a/htdocs/comm/action/class/actioncomm.class.php
+++ b/htdocs/comm/action/class/actioncomm.class.php
@@ -2065,8 +2065,8 @@ class ActionComm extends CommonObject
}

                                            if (!empty($conf->global->AGENDA_EXPORT_FIX_TZ)) {

•                                                   $timestampStart = - ($conf->global->AGENDA_EXPORT_FIX_TZ * 3600);
  

•                                                   $timestampEnd   = - ($conf->global->AGENDA_EXPORT_FIX_TZ * 3600);
  

•                                                   $timestampStart = $timestampStart- ($conf->global->AGENDA_EXPORT_FIX_TZ * 3600);
  

•                                                   $timestampEnd   = $timestampEnd - ($conf->global->AGENDA_EXPORT_FIX_TZ * 3600);
                                            }