From c5cac316c3e6cf5662152ada9c74f54a3ded26c4 Mon Sep 17 00:00:00 2001
From: Francis Lachapelle <flachapelle@inverse.ca>
Date: Thu, 5 Nov 2015 11:53:44 -0500
Subject: [PATCH] (js) Fix all-day dates covering a timezone change

---
 UI/WebServerResources/js/Common/utils.js | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/UI/WebServerResources/js/Common/utils.js b/UI/WebServerResources/js/Common/utils.js
index 0928aead7..aab65da30 100644
--- a/UI/WebServerResources/js/Common/utils.js
+++ b/UI/WebServerResources/js/Common/utils.js
@@ -213,9 +213,18 @@ Date.prototype.stringWithSeparator = function(separator) {
 };
 
 Date.prototype.addDays = function(nbrDays) {
-    var milliSeconds = this.getTime();
-    milliSeconds += 86400000 * nbrDays;
+  var initialDate, milliSeconds, dstOffset;
+
+  milliSeconds = this.getTime();
+  initialDate = new Date(milliSeconds);
+  milliSeconds += 86400000 * nbrDays;
+  this.setTime(milliSeconds);
+
+  dstOffset = this.getTimezoneOffset() - initialDate.getTimezoneOffset();
+  if (dstOffset !== 0) {
+    milliSeconds = this.getTime() + dstOffset*60*1000;
     this.setTime(milliSeconds);
+  }
 };
 
 Date.prototype.addHours = function(nbrHours) {