diff --git a/astro.cpp b/astro.cpp
index 9829b7159..c0e2b1fe3 100644
--- a/astro.cpp
+++ b/astro.cpp
@@ -7,6 +7,7 @@
 #include <QTextStream>
 #include <QSettings>
 #include <QDateTime>
+#include <QTimeZone>
 #include <QDir>
 #include <QCloseEvent>
 #include <QDebug>
@@ -212,7 +213,7 @@ auto Astro::astroUpdate(QDateTime const& t, QString const& mygrid, QString const
         // we do the next period if we calculate just before it starts
         auto sec_since_epoch = t.toMSecsSinceEpoch () / 1000 + 2;
         auto target_sec = sec_since_epoch - sec_since_epoch % TR_period + TR_period / 2;
-        auto target_date_time = QDateTime::fromMSecsSinceEpoch (target_sec * 1000);
+        auto target_date_time = QDateTime::fromMSecsSinceEpoch (target_sec * 1000, QTimeZone::utc ());
         QString date {target_date_time.date().toString("yyyy MMM dd").trimmed ()};
         QString utc {target_date_time.time().toString().trimmed ()};
         int nyear {target_date_time.date().year()};