BUG: Adjust time values with Period objects in Series.dt.end_time

Author: reidy-p

pandas/core/indexes/period.py

@@ -481,7 +481,8 @@ def start_time(self):
 
     @property
     def end_time(self):
-        return self.to_timestamp(how='end')
+        data = (self + 1).start_time.values.astype(int) - 1
+        return DatetimeIndex(data=data)
 
     def _mpl_repr(self):
         # how to represent ourselves to matplotlib