diff --git a/src/scripts/datetime.js b/src/scripts/datetime.js
index f1243a5076..c880468a03 100644
--- a/src/scripts/datetime.js
+++ b/src/scripts/datetime.js
@@ -49,7 +49,7 @@ export function parseISO8601Date(s, toLocal) {
             ms += offset;
         }
     } else if (toLocal === false) {
-        ms += new Date().getTimezoneOffset() * 60000;
+        ms += new Date(ms).getTimezoneOffset() * 60000;
     }
 
     return new Date(ms);