Go to the configuration file by opening the following URL on the netbook:
http://127.0.0.1:8090/[CRUISEID]-SE/?cmd=ecfmhome
Click Edit cfg file and find the line that looks similar to:
Execute new = $shell(echo \"timezone = -4\" > /shipdata/[CRUISEID]/r2r/eventlog/elog/scripts/timezone &)
Change the -4 to the new timezone
Click Save, then click Show Eventlog and add a New event using:
Instrument = ship Action = changeTimezone