diff --git a/lib/mysql.js b/lib/mysql.js
index 16b6404..61f81f1 100644
--- a/lib/mysql.js
+++ b/lib/mysql.js
@@ -321,12 +321,15 @@ MySQL.prototype.updateOrCreate = function(model, data, options, cb) {
 // arsis 2017-03-21 add tzOffset
 function dateToMysql(val, tzOffset) {
   var tz = tzOffset || 0;
+  if (val.getUTCHours() || val.getUTCMinutes() || val.getUTCSeconds()) {
+    val.setUTCHours(val.getUTCHours() + tz);
+  }
   return val.getUTCFullYear() + '-' +
-    fillZeros(val.getUTCMonth() + 1) + '-' +
-    fillZeros(val.getUTCDate()) + ' ' +
-    fillZeros(val.getUTCHours() + tz) + ':' +
-    fillZeros(val.getUTCMinutes()) + ':' +
-    fillZeros(val.getUTCSeconds());
+      fillZeros(val.getUTCMonth() + 1) + '-' +
+      fillZeros(val.getUTCDate()) + ' ' +
+      fillZeros(val.getUTCHours()) + ':' +
+      fillZeros(val.getUTCMinutes()) + ':' +
+      fillZeros(val.getUTCSeconds());
 
   function fillZeros(v) {
     return v < 10 ? '0' + v : v;
--
libgit2 0.21.2