Index: openacs-4/packages/calendar/www/cal-item-new.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/calendar/www/cal-item-new.tcl,v
diff -u -r1.41.2.4 -r1.41.2.5
--- openacs-4/packages/calendar/www/cal-item-new.tcl	25 Jan 2022 11:35:13 -0000	1.41.2.4
+++ openacs-4/packages/calendar/www/cal-item-new.tcl	25 Jan 2022 12:56:16 -0000	1.41.2.5
@@ -197,6 +197,9 @@
     {description {[string equal [set msg [ad_html_security_check $description]] ""]}
         $msg
     }
+    {time_p {$time_p in {0 1}}
+        "#acs-templating.Invalid_choice#"
+    }
 } -new_request {
     # Seamlessly create a private calendar if the user doesn't have one
     if { ![calendar::have_private_p -party_id $user_id] } {