diff --git a/calsocial/calendar_system/gregorian.py b/calsocial/calendar_system/gregorian.py
index 0967b0d..f80a767 100644
--- a/calsocial/calendar_system/gregorian.py
+++ b/calsocial/calendar_system/gregorian.py
@@ -92,11 +92,11 @@ class GregorianCalendar(CalendarSystem):
     @property
     def prev_month_name(self):
         if self.timestamp.month == 1:
-            ts = self.prev_year.replace(month=12)
+            timestamp = self.prev_year.replace(month=12)
         else:
-            ts = self.timestamp.replace(month=self.timestamp.month - 1)
+            timestamp = self.timestamp.replace(month=self.timestamp.month - 1)
 
-        return self.month_names[ts.month - 1]
+        return self.month_names[timestamp.month - 1]
 
     @property
     @to_timestamp
@@ -109,11 +109,11 @@ class GregorianCalendar(CalendarSystem):
     @property
     def next_month_name(self):
         if self.timestamp.month == 12:
-            ts = self.prev_year.replace(month=1)
+            timestamp = self.prev_year.replace(month=1)
         else:
-            ts = self.timestamp.replace(month=self.timestamp.month + 1)
+            timestamp = self.timestamp.replace(month=self.timestamp.month + 1)
 
-        return self.month_names[ts.month - 1]
+        return self.month_names[timestamp.month - 1]
 
     @property
     @to_timestamp
diff --git a/calsocial/forms.py b/calsocial/forms.py
index a93504b..3b0e4b6 100644
--- a/calsocial/forms.py
+++ b/calsocial/forms.py
@@ -78,11 +78,11 @@ class EventForm(FlaskForm):
     def populate_obj(self, obj):
         FlaskForm.populate_obj(self, obj)
 
-        tz = self.time_zone.data
+        timezone = self.time_zone.data
 
-        obj.time_zone = str(tz)
-        obj.start_time = tz.localize(self.start_time.data).astimezone(pytz.utc)
-        obj.end_time = tz.localize(self.end_time.data).astimezone(pytz.utc)
+        obj.time_zone = str(timezone)
+        obj.start_time = timezone.localize(self.start_time.data).astimezone(pytz.utc)
+        obj.end_time = timezone.localize(self.end_time.data).astimezone(pytz.utc)
 
     def validate_end_time(self, field):
         if field.data < self.start_time.data: