diff --git a/src/lib/moment/format.js b/src/lib/moment/format.js
index d3080aa036..9544f5173a 100644
--- a/src/lib/moment/format.js
+++ b/src/lib/moment/format.js
@@ -23,7 +23,7 @@ export function toISOString(keepOffset) {
         if (utc) {
             return this.toDate().toISOString();
         } else {
-            return new Date(this._d.valueOf()).toISOString().replace('Z', formatMoment(m, 'Z'));
+            return new Date(this.valueOf() + this.utcOffset() * 60 * 1000).toISOString().replace('Z', formatMoment(m, 'Z'));
         }
     }
     return formatMoment(m, utc ? 'YYYY-MM-DD[T]HH:mm:ss.SSS[Z]' : 'YYYY-MM-DD[T]HH:mm:ss.SSSZ');