Index: openacs-4/packages/caldav/tcl/caldav-interface-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/caldav/tcl/Attic/caldav-interface-procs.tcl,v
diff -u -r1.1.2.2 -r1.1.2.3
--- openacs-4/packages/caldav/tcl/caldav-interface-procs.tcl	5 Jul 2022 11:49:38 -0000	1.1.2.2
+++ openacs-4/packages/caldav/tcl/caldav-interface-procs.tcl	11 Jul 2022 09:43:48 -0000	1.1.2.3
@@ -68,7 +68,7 @@
             foreach day [split $days_of_week " "] {
                 lappend rec_list [lindex $week_list $day]
             }
-            append recur_rule ";BYDAY=" [ns_dbquotelist $rec_list]
+            append recur_rule ";BYDAY=" [join $rec_list ,]
         }
 
         if {$every_nth_interval ne ""} {