Use UTC in generating DOS date

Author: joelmukuthu

lib/archivers/zip/util.js

@@ -9,7 +9,7 @@ var Int64 = require('node-int64');
 var util = module.exports = {};
 
 util.dateToDos = function(d) {
-  var year = d.getFullYear();
+  var year = d.getUTCFullYear();
 
   if (year < 1980) {
     return 2162688; // 1980-1-1 00:00:00
@@ -19,11 +19,11 @@ util.dateToDos = function(d) {
 
   var val = {
     year: year,
-    month: d.getMonth(),
-    date: d.getDate(),
-    hours: d.getHours(),
-    minutes: d.getMinutes(),
-    seconds: d.getSeconds()
+    month: d.getUTCMonth(),
+    date: d.getUTCDate(),
+    hours: d.getUTCHours(),
+    minutes: d.getUTCMinutes(),
+    seconds: d.getUTCSeconds()
   };
 
   return ((val.year - 1980) << 25) | ((val.month + 1) << 21) | (val.date << 16) |