Improve info

Author: krystofkomanec

docs/more/development/document-templates/specification.rst

@@ -96,7 +96,10 @@ Here are described the changes in metamodel for template specification as well a
 Version 18.1 (since 4.31.0)
 ---------------------------
 
-* Added support for Python ``datetime`` and ``zoneinfo`` in templates.
+* Added:
+
+  * ``datetime`` = exposes datetime (https://docs.python.org/3/library/datetime.html) module from Python
+  * ``zoneinfo`` = exposes zoneinfo (zoneinfo — IANA time zone support — Python 3.14.5 documentation) module from Python
 
 Version 18.0 (since 4.29.0)
 ---------------------------

docs/more/development/document-templates/steps/jinja.rst

@@ -132,6 +132,7 @@ We provide several filters that can be used for conversion of values:
 
     -  ``iso_timestamp`` - ``datetime`` or ISO 8601 ``str``
     -  ``fmt`` - datetime format passed to `strftime <https://docs.python.org/3/library/datetime.html#datetime.date.strftime>`__
+    -  ``tz`` (optional) - timezone name (e.g. ``"UTC"``, ``"Europe/Prague"``) for formatting the timestamp; if not provided, UTC is used
 
 - ``of_alphabet`` = *Converts integer to characters*