Impacts on Timezone changes

I'm running on UNIX with Solaris. I need to change the Timezone on the box and was going to make the changes to the files and then reboot the box.

Someone warned me that this method should not be used and that a util (unconfig.sys I think it was) should be used to make the changes.

Any ideas why? And what impacts are there is I just change the files and reboot?

Anyone?

I would just change /etc/TIMEZONE and reboot.

At install time, Sun's will ask for IP address, hostname, and all sorts of other info. sys-unconfig undoes all of this, so that the next reboot will ask again for everything.

So you dont know any impacts or reason why one can't change the TIMEZONE and reboot?