diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index d873841b17..a315a1f481 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -1330,8 +1330,8 @@ class ScheduleSerializer(BaseSerializer):
     # - BYWEEKNO
     def validate_rrule(self, attrs, source):
         rrule_value = attrs[source]
-        if not 'dtstart' in rrule_value.lower():
-            raise serializers.ValidationError('DTSTART required in rrule')
+        if not re.match("DTSTART[\:\=][0-9]+T[0-9]+Z", rrule_value):
+            raise serializers.ValidationError('DTSTART required in rrule, value should match: DTSTART:YYYYMMDDTHHMMSSZ')
         if not 'interval' in rrule_value.lower():
             raise serializers.ValidationError('INTERVAL required in rrule')
         if 'tzid' in rrule_value.lower():
diff --git a/awx/main/models/schedules.py b/awx/main/models/schedules.py
index ce6ac0f2f2..a3a6f7a1cf 100644
--- a/awx/main/models/schedules.py
+++ b/awx/main/models/schedules.py
@@ -98,6 +98,6 @@ class Schedule(CommonModel):
         self.unified_job_template.update_computed_fields()
 
     def save(self, *args, **kwargs):
-        # Check if new rrule, if so set dtstart and dtend to null
+        # TODO: Check if new rrule, if so set dtstart and dtend to null
         self.update_computed_fields()
         super(Schedule, self).save(*args, **kwargs)