diff --git a/libc/time/localtime.c b/libc/time/localtime.c
index 604309c5343..b61f935979e 100644
--- a/libc/time/localtime.c
+++ b/libc/time/localtime.c
@@ -110,11 +110,10 @@ static const char	gmt[] = "GMT";
 /*
 ** The DST rules to use if TZ has no rules and we can't load TZDEFRULES.
 ** Default to US rules as of 2017-05-07.
-** POSIX does not specify the default DST rules;
-** for historical reasons, US rules are a common default.
+** Default to GMT rules as of 2023-07-25.
 */
 #ifndef TZDEFRULESTRING
-#define TZDEFRULESTRING ",M3.2.0,M11.1.0"
+#define TZDEFRULESTRING "GMT0"
 #endif
 
 struct ttinfo {				/* time type information */
diff --git a/libc/time/tzfile.internal.h b/libc/time/tzfile.internal.h
index 3c892b77f99..5934778bf23 100644
--- a/libc/time/tzfile.internal.h
+++ b/libc/time/tzfile.internal.h
@@ -29,7 +29,7 @@
 #endif /* !defined TZDEFAULT */
 
 #ifndef TZDEFRULES
-#define TZDEFRULES	"New_York"
+#define TZDEFRULES	"GMT"
 #endif /* !defined TZDEFRULES */