Index: openacs-4/packages/calendar-portlet/www/calendar-portlet.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/calendar-portlet/www/calendar-portlet.tcl,v
diff -u -r1.36 -r1.37
--- openacs-4/packages/calendar-portlet/www/calendar-portlet.tcl	7 Aug 2017 23:48:05 -0000	1.36
+++ openacs-4/packages/calendar-portlet/www/calendar-portlet.tcl	23 Apr 2018 14:19:14 -0000	1.37
@@ -22,12 +22,12 @@
     @cvs_id $Id$
 } {
     {view ""}
-    {page_num:naturalnum ""}
+    {page_num:naturalnum 0}
     {date ""}
     {period_days:naturalnum,optional}
     {julian_date ""}
 } -properties {
-    
+
 }  -validate {
     valid_date -requires { date } {
         if {$date ne "" } {