Index: openacs-4/packages/calendar/www/view.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/calendar/www/view.tcl,v
diff -u -r1.31.2.6 -r1.31.2.7
--- openacs-4/packages/calendar/www/view.tcl	4 Jun 2016 11:11:43 -0000	1.31.2.6
+++ openacs-4/packages/calendar/www/view.tcl	31 Mar 2017 11:36:29 -0000	1.31.2.7
@@ -16,7 +16,9 @@
     
     valid_date -requires { date } {
         if {$date ne "" } {
-            if {[catch {set date [clock format [clock scan $date] -format "%Y-%m-%d"]} err]} {
+            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]
+            } {
                 ad_complain "Your input was not valid. It has to be in the form YYYY-MM-DD."
             }
         }