diff -u at-3.1.8/parsetime.y.orig at-3.1.8/parsetime.y
--- at-3.1.8/parsetime.y.orig	Sun Mar  4 18:13:06 2001
+++ at-3.1.8/parsetime.y	Sun Mar  4 18:26:04 2001
@@ -593,6 +593,9 @@
 
     case YEAR:
 	exectm.tm_year += number;
+	/* Recalculate tm_isdst so we don't get a +-1 hour creep */
+	exectm.tm_isdst = -1;
+	(void) mktime(&exectm);
 	break;
 
     default: