diff --git a/README.rst b/README.rst
index 4ef95f3..22ccbea 100644
--- a/README.rst
+++ b/README.rst
@@ -45,6 +45,7 @@ which are not defined in the Olson database.
 Instead of the own UTC tzinfo implementation we use pytz UTC tzinfo object now.
 
 
+
 About this fork which is not a fork anymore
 ===========================================
 
diff --git a/docs/changelog.rst b/docs/changelog.rst
index e01d142..7af7b02 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -5,6 +5,12 @@ Changelog
 3.0.1b2 (unreleased)
 --------------------
 
+* For all TZID parameters in DATE-TIME properties, use timezone identifiers
+  (e.g. Europe/Vienna) instead of timezone names (e.g. CET), as required by
+  RFC5545. Timezone names are used together with timezone identifiers in the
+  Timezone components.
+  [thet]
+
 * Since we use pytz for timezones, also use UTC tzinfo object from the pytz 
   library instead of own implementation.
   [thet]