diff --git a/Doc/library/datetime.rst b/Doc/library/datetime.rst
--- a/Doc/library/datetime.rst
+++ b/Doc/library/datetime.rst
@@ -1597,6 +1597,13 @@
or any other fixed-offset :class:`tzinfo` subclass (such as a class representing
only EST (fixed offset -5 hours), or only EDT (fixed offset -4 hours)).
+.. seealso::
+
+ `pytz `_
+ While Python Standard Library has no :class:`zinfo` instances except UTC
+ there are `pytz` library which brings Olson timezone database to Python.
+
+ `pytz` is up-to-date info and recommended to use.
.. _datetime-timezone: