diff -Nrup a/Makefile b/Makefile
--- a/Makefile	2023-03-22 17:41:49.069789592 -0400
+++ b/Makefile	2023-03-22 17:44:07.528427093 -0400
@@ -52,7 +52,7 @@ LOCALTIME=	Factory
 #	make zonenames
 # to get a list of the values you can use for POSIXRULES.
 
-POSIXRULES=	-
+POSIXRULES=	America/New_York
 
 # Also see TZDEFRULESTRING below, which takes effect only
 # if POSIXRULES is '-' or if the template file cannot be accessed.
Binary files a/tzdata2023a-rearguard.tar.gz and b/tzdata2023a-rearguard.tar.gz differ