use astimezone instead of normalize

pandas-dev · jreback · Jun 13, 2018 · Jun 9, 2018 · Jun 9, 2018 · Jun 10, 2018
commit 7e183a859a1c84cc52ac1f1d9f40602adf026f6a
diff --git a/pandas/_libs/tslibs/conversion.pyx b/pandas/_libs/tslibs/conversion.pyx
@@ -349,12 +349,7 @@ cdef _TSObject convert_datetime_to_tsobject(datetime ts, object tz,
 
         if ts.tzinfo is not None:
             if hasattr(tz, 'normalize') and hasattr(ts.tzinfo, '_utcoffset'):
-                # tz.localize does not correctly localize Timestamps near DST
-                # but correctly localizes datetimes
-                if not PyDateTime_CheckExact(ts):
-                    nanos += ts.nanosecond
-                    ts = ts.to_pydatetime()
-                ts = tz.normalize(ts)
+                ts = ts.astimezone(tz)
                 obj.value = pydatetime_to_dt64(ts, &obj.dts)
                 obj.tzinfo = ts.tzinfo
             else: