Index: openacs-4/packages/calendar/www/view.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/calendar/www/view.tcl,v
diff -u -N -r1.31.2.7 -r1.31.2.8
--- openacs-4/packages/calendar/www/view.tcl	31 Mar 2017 11:36:29 -0000	1.31.2.7
+++ openacs-4/packages/calendar/www/view.tcl	4 May 2017 12:09:50 -0000	1.31.2.8
@@ -17,7 +17,7 @@
     valid_date -requires { date } {
         if {$date ne "" } {
             if {[catch {set date [clock format [clock scan $date -format "%Y-%m-%d"] -format "%Y-%m-%d"]} err]
-                || [catch {set date [clock format [clock scan $date  -format "%Y%m%d"] -format "%Y-%m-%d"]} err]
+                && [catch {set date [clock format [clock scan $date  -format "%Y%m%d"] -format "%Y-%m-%d"]} err]
             } {
                 ad_complain "Your input was not valid. It has to be in the form YYYY-MM-DD."
             }