diff --git a/UpdatePTUDevCtrl/ismas/ismas_client.cpp b/UpdatePTUDevCtrl/ismas/ismas_client.cpp
index 603c99a..2d94554 100644
--- a/UpdatePTUDevCtrl/ismas/ismas_client.cpp
+++ b/UpdatePTUDevCtrl/ismas/ismas_client.cpp
@@ -363,7 +363,19 @@ QString IsmasClient::updateNewsToIsmas(char const *event,
     char buf[1024];
     memset(buf, 0, sizeof(buf));
 
-    QString const ts = QDateTime::currentDateTime().toString(Qt::ISODateWithMs);
+    QDateTime const local(QDateTime::currentDateTime());
+
+    QDateTime utc(local);
+    utc.setTimeSpec(Qt::UTC);
+
+    int const diff = (int)local.secsTo(utc); // diff between UTC and local time
+
+    QTime t(0, 0, 0);
+    t = t.addSecs((uint)diff);
+
+    QString const st(QString("%1%2").arg(diff < 0 ? "-" : "+").arg(t.toString("hh:mm")));
+    QString const ts(local.toString(Qt::ISODateWithMs) + st);
+
     snprintf(buf, sizeof(buf)-1,
         "{"
             "\"REASON\":\"SW_UP\","