diff --git a/ietf/meeting/tests_views.py b/ietf/meeting/tests_views.py
index 848c9b772..519f5f7c2 100644
--- a/ietf/meeting/tests_views.py
+++ b/ietf/meeting/tests_views.py
@@ -385,7 +385,20 @@ class MeetingTests(BaseMeetingTestCase):
         assert_ical_response_is_valid(self, r)
         self.assertContains(r, "BEGIN:VTIMEZONE")
         self.assertContains(r, "END:VTIMEZONE")
-
+        self.assertContains(r, meeting.time_zone, msg_prefix="time_zone should appear in its original case")
+        self.assertNotEqual(
+            meeting.time_zone,
+            meeting.time_zone.lower(),
+            "meeting needs a mixed-case tz for this test",
+        )
+        self.assertNotContains(r, meeting.time_zone.lower(), msg_prefix="time_zone should not be lower-cased")
+        self.assertNotEqual(
+            meeting.time_zone,
+            meeting.time_zone.upper(),
+            "meeting needs a mixed-case tz for this test",
+        )
+        self.assertNotContains(r, meeting.time_zone.upper(), msg_prefix="time_zone should not be upper-cased")
+    
         # iCal, single group
         r = self.client.get(ical_url + "?show=" + session.group.parent.acronym.upper())
         assert_ical_response_is_valid(self, r)
diff --git a/ietf/templates/meeting/agenda.ics b/ietf/templates/meeting/agenda.ics
index 8bc8222bb..eb83dd479 100644
--- a/ietf/templates/meeting/agenda.ics
+++ b/ietf/templates/meeting/agenda.ics
@@ -1,4 +1,4 @@
-{% load humanize tz %}{% autoescape off %}{% timezone schedule.meeting.tz %}{% with tzname=schedule.meeting.time_zone|lower %}{% load ietf_filters textfilters %}{% load cache %}{% cache 1800 ietf_meeting_agenda_ics schedule.meeting.number request.path request.GET %}BEGIN:VCALENDAR
+{% load humanize tz %}{% autoescape off %}{% timezone schedule.meeting.tz %}{% with tzname=schedule.meeting.time_zone %}{% load ietf_filters textfilters %}{% load cache %}{% cache 1800 ietf_meeting_agenda_ics schedule.meeting.number request.path request.GET %}BEGIN:VCALENDAR
 VERSION:2.0
 METHOD:PUBLISH
 PRODID:-//IETF//datatracker.ietf.org ical agenda//EN