From 888328b03b5c9a464490f48b181c7829fc4ec46f Mon Sep 17 00:00:00 2001
From: comaiteseb <109105553+comaiteseb@users.noreply.github.com>
Date: Tue, 19 Jul 2022 15:31:29 +0200
Subject: [PATCH] FIX issue Dolibarr#21495 for v15

FIX #21495

Error when calculate the date when AGENDA_EXPORT_FIX_TZ is set.
The resulting date is 1969-12-31
---
 htdocs/comm/action/class/actioncomm.class.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/htdocs/comm/action/class/actioncomm.class.php b/htdocs/comm/action/class/actioncomm.class.php
index a5c8a11ade0..627855a94e8 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);
 						}
 
 						$urlwithouturlroot = preg_replace('/'.preg_quote(DOL_URL_ROOT, '/').'$/i', '', trim($dolibarr_main_url_root));