diff --git a/tzfile.h b/tzfile.h
index 8caef75..d49595f 100644
--- a/tzfile.h
+++ b/tzfile.h
@@ -4,7 +4,7 @@
 
 /*
 ** This file is in the public domain, so clarified as of
-** June 5, 1996 by Arthur David Olson (arthur_david_olson@nih.gov).
+** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
 */
 
 /*