Index: openacs-4/packages/calendar/www/view-month-display.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/calendar/www/view-month-display.tcl,v
diff -u -r1.29.2.2 -r1.29.2.3
--- openacs-4/packages/calendar/www/view-month-display.tcl	23 Mar 2023 17:12:41 -0000	1.29.2.2
+++ openacs-4/packages/calendar/www/view-month-display.tcl	22 Oct 2023 16:30:01 -0000	1.29.2.3
@@ -8,7 +8,7 @@
       export: may be "print"
 } {
     {date ""}
-    {show_calendar_name_p:boolean 1}
+    {show_calendar_name_p:boolean,notnull 1}
     {calendar_id_list ""}
     {export ""}
     {return_url:optional}