diff --git a/js/gamutable.es6.js b/js/gamutable.es6.js
index 66e659b..900e775 100644
--- a/js/gamutable.es6.js
+++ b/js/gamutable.es6.js
@@ -27,8 +27,24 @@ const orderBy = (arr, props, orders) =>
 		props.reduce((acc, prop, i) => {
 			if (acc === 0) {
 				let [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]];
+				// passe en lowercase les String
 				p1 = typeof p1 === 'string' ? p1.toLowerCase() : p1;
 				p2 = typeof p2 === 'string' ? p2.toLowerCase() : p2;
+
+				// Gestion du format de date
+				// transforme 03/11/2000 en 20001103
+				let re = /^(\d{2,4})\/(\d{2})\/(\d{2,4})$/;
+
+				let r1 = p1.match(re);
+				if (Array.isArray(r1)) {
+					p1 = r1[3] + r1[2] + r1[1];
+				}
+
+				let r2 = p2.match(re);
+				if (Array.isArray(r2)) {
+					p2 = r2[3] + r2[2] + r2[1];
+				}
+
 				acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
 			}
 			return acc;
diff --git a/js/gamutable.js b/js/gamutable.js
index 48ded9a..2c79b40 100644
--- a/js/gamutable.js
+++ b/js/gamutable.js
@@ -41,10 +41,26 @@ var orderBy = function orderBy(arr, props, orders) {
         var _ref = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]],
             _ref2 = _slicedToArray(_ref, 2),
             p1 = _ref2[0],
-            p2 = _ref2[1];
+            p2 = _ref2[1]; // passe en lowercase les String
+
 
         p1 = typeof p1 === 'string' ? p1.toLowerCase() : p1;
-        p2 = typeof p2 === 'string' ? p2.toLowerCase() : p2;
+        p2 = typeof p2 === 'string' ? p2.toLowerCase() : p2; // Gestion du format de date
+        // transforme 03/11/2000 en 20001103
+
+        var re = /^(\d{2,4})\/(\d{2})\/(\d{2,4})$/;
+        var r1 = p1.match(re);
+
+        if (Array.isArray(r1)) {
+          p1 = r1[3] + r1[2] + r1[1];
+        }
+
+        var r2 = p2.match(re);
+
+        if (Array.isArray(r2)) {
+          p2 = r2[3] + r2[2] + r2[1];
+        }
+
         acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
       }