BUG: support %z in Timestamp

Author: saurav-chakravorty

pandas/_libs/tslibs/timestamps.pyx

@@ -737,6 +737,8 @@ class Timestamp(_Timestamp):
             # microsecond[, nanosecond[, tzinfo]]]]]])
             ts_input = datetime(ts_input, freq, tz, unit or 0,
                                 year or 0, month or 0, day or 0)
+            # GH 25016
+            # support %z (offset) with %f (microsecond)
             if isinstance(hour, timezone):
                 print("hello")
                 nanosecond = minute