From ab7824f1dcca22bdb8b73f7f98cf660305a73211 Mon Sep 17 00:00:00 2001
From: Isaac Cambron <isaac@isaaccambron.com>
Date: Sun, 15 Sep 2013 04:06:30 -0400
Subject: [PATCH] be smarter about deciding whether something is a date or not.
 fixes #1084

---
 moment.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/moment.js b/moment.js
index 3a5ebd2fe..4cd32db69 100644
--- a/moment.js
+++ b/moment.js
@@ -347,6 +347,10 @@
         return Object.prototype.toString.call(input) === '[object Array]';
     }
 
+    function isDate(input) {
+        return Object.prototype.toString.call(input) === '[object Date]';
+    }
+
     // compare two arrays, return the number of differences
     function compareArrays(array1, array2) {
         var len = Math.min(array1.length, array2.length),
@@ -985,7 +989,7 @@
         } else if (isArray(input)) {
             config._a = input.slice(0);
             dateFromArray(config);
-        } else if (input instanceof Date) {
+        } else if (isDate(input)) {
             config._d = new Date(+input);
         } else if (typeof(input) === 'object') {
             dateFromObject(config);
-- 
2.47.2