Fixed #34070 -- Added subsecond support to Now() on SQLite and MySQL.

docs/ref/models/database-functions.txt

@@ -495,6 +495,11 @@ Usage example::
     ``Now()`` uses ``STATEMENT_TIMESTAMP`` instead. If you need the transaction
     timestamp, use :class:`django.contrib.postgres.functions.TransactionNow`.
 
+.. versionchanged:: 4.2
+
+    Support for microsecond precision on MySQL and millisecond precision on
+    SQLite were added.
+
 ``Trunc``
 ---------
 

docs/releases/4.2.txt

@@ -223,6 +223,9 @@ Models
   the text value of a key, index, or path transform of
   :class:`~django.db.models.JSONField`.
 
+* :class:`~django.db.models.functions.Now` now supports microsecond precision
+  on MySQL and millisecond precision on SQLite.
+
 Requests and Responses
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