如何告诉OpenBSD，我的计算机时钟不是UTC，而是本地时间？

$ sudo /usr/sbin/config -f -e /bsd
OpenBSD 4.2 (GENERIC) #375: Tue Aug 28 10:38:44 MDT 2007
deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
Enter 'help' for information
ukc> timezone 480
timezone = 480, dst = 0
ukc> quit
Saving modified kernel.