mentioned required format for parse_events

mentioned parse_events requires the start and end dates in UTC format

icalevents/icalparser.py

@@ -296,8 +296,8 @@ def parse_events(content, start=None, end=None, default_span=timedelta(days=7)):
     Query the events occurring in a given time range.
 
     :param content: iCal URL/file content as String
-    :param start: start date for search, default today
-    :param end: end date for search
+    :param start: start date for search, default today (in UTC format)
+    :param end: end date for search (in UTC format)
     :param default_span: default query length (one week)
     :return: events as list
     """