diff --git a/lxqt-admin-time/CMakeLists.txt b/lxqt-admin-time/CMakeLists.txt
index e3f18a9f..1ac2c6ee 100644
--- a/lxqt-admin-time/CMakeLists.txt
+++ b/lxqt-admin-time/CMakeLists.txt
@@ -3,7 +3,6 @@ project(lxqt-admin-time)
 # build static helper class first
 include_directories (
     ${CMAKE_CURRENT_BINARY_DIR}
-    ${OOBS_INCLUDE_DIRS}
 )
 
 set ( lxqt-admin-time_HDRS
@@ -77,7 +76,6 @@ target_link_libraries(lxqt-admin-time
     KF5::WindowSystem
     Qt5::Widgets
     lxqt
-    ${OOBS_LIBRARIES}
 )
 
 install(TARGETS lxqt-admin-time RUNTIME DESTINATION bin)
diff --git a/lxqt-admin-time/timeadmindialog.cpp b/lxqt-admin-time/timeadmindialog.cpp
index 8580a556..33e39c0f 100644
--- a/lxqt-admin-time/timeadmindialog.cpp
+++ b/lxqt-admin-time/timeadmindialog.cpp
@@ -39,12 +39,8 @@
 #define ZONETAB_PATH "/usr/share/zoneinfo/zone.tab"
 
 TimeAdminDialog::TimeAdminDialog(QWidget *parent):
-    LXQt::ConfigDialog(tr("Time and date configuration"),new LXQt::Settings("TimeDate"), parent),
-    mTimeConfig(OOBS_TIME_CONFIG(oobs_time_config_get())),
-    mUserLogedIn(false)
+    LXQt::ConfigDialog(tr("Time and date configuration"),new LXQt::Settings("TimeDate"), parent)
 {
-    oobs_object_update(OOBS_OBJECT(mTimeConfig));
-
     setMinimumSize(QSize(400,400));
     mWindowTitle = windowTitle();
 
@@ -67,8 +63,6 @@ TimeAdminDialog::TimeAdminDialog(QWidget *parent):
 
 TimeAdminDialog::~TimeAdminDialog()
 {
-    if(mTimeConfig)
-        g_object_unref(mTimeConfig);
 }
 
 void TimeAdminDialog::onChanged(bool ch)
@@ -93,15 +87,8 @@ void TimeAdminDialog::closeEvent(QCloseEvent *event)
     //save changes to system
     if (mWidgetsModified)
     {
-        if (logInUser())
-        {
-            saveChangesToSystem();
-            event->accept();
-        }
-        else
-        {
-            event->ignore();
-        }
+        saveChangesToSystem();
+        event->accept();
     }
 }
 
@@ -136,35 +123,11 @@ void TimeAdminDialog::saveChangesToSystem()
     // FIXME: currently timezone settings does not work. is this a bug of system-tools-backend?
     if(!timeZone.isEmpty() && mWidgetsModified.testFlag(M_TIMEZONE)) {
         mTimeDateCtl.setTimeZone(timeZone);
-        mTimeDateCtl.commit();
     }
 
     if(mWidgetsModified.testFlag(M_TIMEDATE))
     {
-        QDate d = mDateTimeWidget->dateTime().date();
-        QTime t = mDateTimeWidget->dateTime().time();
-        // oobs seems to use 0 based month
-        oobs_time_config_set_time(mTimeConfig, d.year(), d.month() - 1, d.day(), t.hour(), t.minute(), t.second());
-    }
-    oobs_object_commit(OOBS_OBJECT(mTimeConfig));
-}
-
-bool TimeAdminDialog::logInUser()
-{
-    if (mUserLogedIn)
-        return true;
-
-    GError* err = NULL;
-    if(oobs_object_authenticate(OOBS_OBJECT(mTimeConfig), &err))
-    {
-        mUserLogedIn = true;
-        return true;
+        mTimeDateCtl.setDateTime(mDateTimeWidget->dateTime());
     }
-    else if(err)
-    {
-        QMessageBox::critical(this, tr("Authentication Error"), QString::fromUtf8(err->message));
-        g_error_free(err);
-    }
-
-    return false;
+    mTimeDateCtl.commit();
 }
diff --git a/lxqt-admin-time/timeadmindialog.h b/lxqt-admin-time/timeadmindialog.h
index b33f0d50..f2e5b475 100644
--- a/lxqt-admin-time/timeadmindialog.h
+++ b/lxqt-admin-time/timeadmindialog.h
@@ -26,13 +26,8 @@
  * END_COMMON_COPYRIGHT_HEADER */
 
 #include <LXQt/ConfigDialog>
-#include <glib.h>
-#include <oobs/oobs-timeconfig.h>
-#include <oobs/oobs-ntpconfig.h>
-#include <oobs/oobs-ntpserver.h>
 #include "timedatectl.h"
 
-
 class DateTime;
 class Timezone;
 
@@ -55,17 +50,14 @@ private Q_SLOTS:
     void onChanged(bool);
 
 private:
-    bool logInUser();
     void saveChangesToSystem();
     void loadTimeZones(QStringList & timeZones, QString & currentTimezone);
     void showChangedStar();
 
 private:
     TimeDateCtl mTimeDateCtl;
-    OobsTimeConfig* mTimeConfig;
     DateTime * mDateTimeWidget;
     Timezone * mTimezoneWidget;
-    bool mUserLogedIn;
     QString mWindowTitle;
     widgets_modified_t mWidgetsModified;
 };
diff --git a/lxqt-admin-time/timedatectl.cpp b/lxqt-admin-time/timedatectl.cpp
index 214fd556..e049b56e 100644
--- a/lxqt-admin-time/timedatectl.cpp
+++ b/lxqt-admin-time/timedatectl.cpp
@@ -24,12 +24,21 @@ TimeDateCtl::TimeDateCtl()
 
 bool TimeDateCtl::commit()
 {
+    bool success = true;
     QProcess timedatectl;
     QStringList args;
     if(mTimeZoneChanged) {
-        args << "set-timezone" << mTimeZone;
+        timedatectl.start(QStringLiteral("timedatectl"), QStringList() << "set-timezone" << mTimeZone);
+        timedatectl.waitForFinished();
+        success = timedatectl.exitCode() == 0;
     }
-    timedatectl.start(QStringLiteral("timedatectl"), args);
-    timedatectl.waitForFinished();
-    return timedatectl.exitCode() == 0;
+    if(!success)
+        return success;
+
+    if(mTimeChanged) {
+        timedatectl.start(QStringLiteral("timedatectl"), QStringList() << "set-time" << mDateTime.toString("yyyy-MM-dd hh:mm:ss"));
+        timedatectl.waitForFinished();
+        success = timedatectl.exitCode() == 0;
+    }
+    return success;
 }