From c9c996536727dc0ee2e35dccfa2a08522470c49e Mon Sep 17 00:00:00 2001
From: Manuel Cillero <manuel@cillero.es>
Date: Wed, 26 Jul 2017 20:06:39 +0200
Subject: [PATCH] Solved a problem access to first day of the year

---
 sites/all/modules/calendar/includes/calendar.views.inc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sites/all/modules/calendar/includes/calendar.views.inc b/sites/all/modules/calendar/includes/calendar.views.inc
index 01a9369..475f73e 100644
--- a/sites/all/modules/calendar/includes/calendar.views.inc
+++ b/sites/all/modules/calendar/includes/calendar.views.inc
@@ -19,6 +19,9 @@ function calendar_views_query_alter(&$view, &$query) {
         $arg = date_pad(date_part_extract($date, 'year'), 4) .'-'. date_pad(date_part_extract($date, 'month'));
         break; 
       case 'week':
+        $ww = date_day_of_week($date, DATE_ISO);
+        $ww = variable_get('date_first_day', 1) ? ($ww == 0 ? 6 : $ww - 1) : $ww;
+        $date = date('Y-m-d', strtotime("-$ww days", strtotime($date)));
         $arg = date_pad(date_part_extract($date, 'year'), 4) .'-W'. date_pad(date_week($date));
         break; 
       default: