Whatsnew

Author: jbrockmendel

doc/source/whatsnew/v3.0.0.rst

@@ -354,7 +354,7 @@ When passing strings, the resolution will depend on the precision of the string,
     In [5]: pd.to_datetime(["2024-03-22 11:43:01.002003004"]).dtype
     Out[5]: dtype('<M8[ns]')
 
-The inferred resolution now matches that of the input strings:
+The inferred resolution now matches that of the input strings for nanosecond-precision strings, otherwise defaulting to microseconds:
 
 .. ipython:: python
 
@@ -363,6 +363,8 @@ The inferred resolution now matches that of the input strings:
     In [4]: pd.to_datetime(["2024-03-22 11:43:01.002003"]).dtype
     In [5]: pd.to_datetime(["2024-03-22 11:43:01.002003004"]).dtype
 
+This is also a change for the :class:`Timestamp` constructor with a string input, which in version 2.x.y could give second or millisecond unit, which users generally disliked (:issue:`52653`)
+
 In cases with mixed-resolution inputs, the highest resolution is used:
 
 .. code-block:: ipython