diff --git a/lib/layouts.js b/lib/layouts.js
index b171cee..35b2aee 100644
--- a/lib/layouts.js
+++ b/lib/layouts.js
@@ -166,6 +166,8 @@ function patternLayout (pattern, tokens) {
       // Pick up special cases
       if (format == "ISO8601") {
         format = dateFormat.ISO8601_FORMAT;
+      } else if (format == "ISO8601_WITH_TZ_OFFSET") {
+        format = dateFormat.ISO8601_WITH_TZ_OFFSET_FORMAT;
       } else if (format == "ABSOLUTE") {
         format = dateFormat.ABSOLUTETIME_FORMAT;
       } else if (format == "DATE") {