Update and rename convert-json-date.md to json-to-date.md

snippets/json-to-date.md

@@ -0,0 +1,12 @@
+### JSON to date
+ 
+ 
+ ```js
+cconst JsonToDate = arr =>
+    {
+        const dt = new Date(parseInt(arr.toString().substr(6)));
+        return dt.getDate() + '/' + dt.getMonth() + '/' + dt.getFullYear();
+    };
+ // JsonToDate(/Date(1489525200000)/) -> 15/2/2017
+ ```
+