diff --git a/app/controllers/concerns/foreman/controller/timezone.rb b/app/controllers/concerns/foreman/controller/timezone.rb
index 5f8e09d1608..962186e86c1 100644
--- a/app/controllers/concerns/foreman/controller/timezone.rb
+++ b/app/controllers/concerns/foreman/controller/timezone.rb
@@ -8,6 +8,9 @@ def set_timezone
         client_timezone  = User.current.try(:timezone) || cookies[:timezone]
         Time.zone        = client_timezone if client_timezone.present?
         yield
+      rescue ArgumentError
+        Time.zone = ActiveSupport::TimeZone['UTC']
+        yield
       ensure
         # Reset timezone for the next thread
         Time.zone = default_timezone