Difference between GMT-5 and EST

I have a sun system with the TZ set to GMT-5. The contents of my /etc/default/init file are:

When I change TZ to EST my results from date shows up correct. Also if I were to changed my TZ to GMT+5, my result would be correct.  However, since I'm in Maryland,(GMT-5) and need to have the output of this command be GMT.  Can someone explain how I can obtain the desired results with TZ set to GMT-5?
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This is the TZ setting at /etc/default/init

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Also /etc/TIMEZONE should be S Link to same file

bin/ee> ls -lt /etc/TIMEZONE
lrwxrwxrwx   1 root     other         14 Apr 22  2001 /etc/TIMEZONE -> ./default/init*
After editing /etc/default/init , don't forget to reboot

also check user's .profile .csh files, it could be setup again in their login file.

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