use QDate instead of python datetime object

openlp/core/lib/settings.py

@@ -126,7 +126,7 @@ class Settings(QtCore.QSettings):
         u'general/has run wizard': False,
         u'general/language': u'[en]',
         # This defaults to yesterday in order to force the update check to run when you've never run it before.
-        u'general/last version test': datetime.datetime.now().date() - datetime.timedelta(days=1),
+        u'general/last version test': QtCore.QDate.currentDate().addDays(-1),
         u'general/loop delay': 5,
         u'general/recent files': [],
         u'general/save prompt': False,

openlp/core/utils/__init__.py

@@ -29,7 +29,6 @@
 """
 The :mod:`openlp.core.utils` module provides the utility libraries for OpenLP.
 """
-from datetime import datetime
 from distutils.version import LooseVersion
 import logging
 import locale
@@ -184,7 +183,7 @@ def check_latest_version(current_version):
     settings = Settings()
     settings.beginGroup(u'general')
     last_test = settings.value(u'last version test')
-    this_test = datetime.now().date()
+    this_test = QtCore.QDate.currentDate()
     settings.setValue(u'last version test', this_test)
     settings.endGroup()
     # Tell the main window whether there will ever be data to display