diff --git a/usr.sbin/bsdinstall/scripts/auto b/usr.sbin/bsdinstall/scripts/auto
--- a/usr.sbin/bsdinstall/scripts/auto
+++ b/usr.sbin/bsdinstall/scripts/auto
@@ -265,6 +265,18 @@
 	fi
 fi
 
+#
+# If we ran netconfig just now, it means we're going to download
+# something, so we need to set the clock, or we may fail to validate
+# server certificates.
+#
+if [ "$NETCONFIG_DONE" = yes ]; then
+	if [ -z "$BSDINSTALL_SKIP_TIME" ]; then
+		bsdinstall time
+		BSDINSTALL_SKIP_TIME=yes
+	fi
+fi
+
 rm -f $PATH_FSTAB
 touch $PATH_FSTAB