Custom Linux Timezone

I believe rdesktop 1.7.1 is sending Linux timezones (For example "EST") to the Windows client I regularly connect to _(I am yet to find a way of seeing what Windows receives in the way of RDP settings in general, or just the timezone setting; Nor do I know how to monitor what rdesktop is sending to the Windows client. If anyone can increase my knowledge in either of these areas, please provide info/point me at something to read)_. This seems to be causing an issue with Windows, as it doesn't match any of the timezones in the registry @ HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones (See below error _"Your current time zone is not recognized. Please select a valid time zone using the link below"_).  I don't have zic on my live distro (Parted Magic) and so was wondering if there is any other way of changing the time zone to display "Eastern Daylight Time" either system wide, or just what rdesktop sends?