help with rcs since update on EST 2007

Platform : Win XP pro.

Using ci. version 5.7.

my script has the command:
set TZ=EST5EDT

I just   checked in a file : it it actually 15:54  EST 
time in checkin file is 4 hours ahead....


RCS file: RCS/IVIMLOTX.SRC,v
Working file: IVIMLOTX.SRC
head: 2.1
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 1;     selected revisions: 1
description:
----------------------------
revision 2.1
date: 2007/03/13 19:53:14;  author: yvan;  state: Exp;
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