revert datelike if-else body

Author: arw2019

pandas/core/dtypes/cast.py

@@ -185,7 +185,16 @@ def maybe_downcast_to_dtype(result, dtype: Dtype):
     # a datetimelike
     # GH12821, iNaT is cast to float
     if dtype.kind in ["M", "m"] and result.dtype.kind in ["i", "f"]:
-        result = result.astype(dtype)
+        if is_datetime_or_timedelta_dtype(dtype):
+            result = result.astype(dtype)
+        else:
+            # not a numpy dtype
+            if dtype.tz:
+                # convert to datetime and change timezone
+                from pandas import to_datetime
+
+                result = to_datetime(result).tz_localize("utc")
+                result = result.tz_convert(dtype.tz)
 
     return result