diff --git a/catalyst/utils/calendars/trading_calendar.py b/catalyst/utils/calendars/trading_calendar.py
index 4748b1c2..a6885fd0 100644
--- a/catalyst/utils/calendars/trading_calendar.py
+++ b/catalyst/utils/calendars/trading_calendar.py
@@ -640,12 +640,9 @@ class TradingCalendar(with_metaclass(ABCMeta)):
         """
         sched = self.schedule
 
-        # `market_open` and `market_close` should be timezone aware, but pandas
-        # 0.16.1 does not appear to support this:
-        # http://pandas.pydata.org/pandas-docs/stable/whatsnew.html#datetime-with-tz  # noqa
         return (
-            sched.at[session_label, 'market_open'].tz_localize('UTC'),
-            sched.at[session_label, 'market_close'].tz_localize('UTC'),
+            sched.at[session_label, 'market_open'],
+            sched.at[session_label, 'market_close'],
         )
 
     def session_open(self, session_label):