diff --git a/en/appendices/5-3-migration-guide.rst b/en/appendices/5-3-migration-guide.rst
index c320e3cb35..0a1c333b8d 100644
--- a/en/appendices/5-3-migration-guide.rst
+++ b/en/appendices/5-3-migration-guide.rst
@@ -81,6 +81,12 @@ Database
 - Added support for ``inet``, ``cidr`` and ``macaddr`` network column types to
   postgres driver.
 
+I18n
+----
+
+- Added ``DAteTimePeriod`` which wraps a php ``DatePeriod`` and returns ``DateTime``
+  instances when iterating.
+
 Mailer
 ------