weird output from date w/ TZ

[Joshua Franklin]

I've searched long and hard on the 'Net and mailing
lists to no avail. There are a lot of webpages with
the word "date" in them, though. 

I'm trying to build a script that determined whether
tomorrow is the first of the month, for use in cron.
I've put together something like:

if [ $(TZ=CST-24 date +%e) -eq 1 ]; then
       do_stuff
fi

But I'm seeing some weird output from that subshell.
It seems to be off by about 6 hours:
[23:05:03]ns1~$ date
Wed Oct 31 23:05:09 CST 2001
[23:05:09]ns1~$  echo  $(TZ=CST-24 date +%D)
11/02/01
[23:05:13]ns1~$  echo  $(TZ=CST-18 date +%D)
11/01/01
[23:05:17]ns1~$  echo  $(TZ=CST-19 date +%D)
11/02/01
[23:05:57]ns1~$  echo  $(TZ=CST date)
Thu Nov 1 05:07:10 CST 2001
[23:05:19]ns1~$ date --v
date (GNU sh-utils) 2.0
Written by David MacKenzie.

Copyright (C) 1999 Free Software Foundation, Inc.
This is free software; see the source for copying
conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.

Anyone have an idea?

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