diff --git a/okhttp/src/main/java/com/squareup/okhttp/internal/http/HttpDate.java b/okhttp/src/main/java/com/squareup/okhttp/internal/http/HttpDate.java
index 827595829..b4d2c7c07 100644
--- a/okhttp/src/main/java/com/squareup/okhttp/internal/http/HttpDate.java
+++ b/okhttp/src/main/java/com/squareup/okhttp/internal/http/HttpDate.java
@@ -36,7 +36,7 @@ final class HttpDate {
       new ThreadLocal<DateFormat>() {
         @Override protected DateFormat initialValue() {
           DateFormat rfc1123 = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US);
-          rfc1123.setTimeZone(TimeZone.getTimeZone("UTC"));
+          rfc1123.setTimeZone(TimeZone.getTimeZone("GMT"));
           return rfc1123;
         }
       };