diff --git a/dlls/ntdll/time.c b/dlls/ntdll/time.c
index e92c0fb01e9..db3f4c5aa95 100644
--- a/dlls/ntdll/time.c
+++ b/dlls/ntdll/time.c
@@ -294,6 +294,9 @@ static const struct tagTZ_INFO TZ_INFO[] =
    {"EST",
     {'E','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
      'a','r','d',' ','T','i','m','e','\0'}, -600, 0},
+   {"EST",
+    {'E','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
+     'a','r','d',' ','T','i','m','e','\0'}, -660, 1},
    {"GST",
     {'W','e','s','t',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d',
      'a','r','d',' ','T','i','m','e','\0'}, -600, 0},