Dingoonity.org

In the 20 Aug 2014 firmware, it was possible to automatically set the time via connecting to WLAN.
Every time I did it, however, it set my time to CET/CEST (Central European -Summer- Time).
I am from the Eastern United States. This time zone means nothing to me, unless there was a World Clock application;
I am in EST/EDT (Eastern Standard/Daylight Time).

I managed to change the time zone accordingly, so when you connect to WLAN, the time is correctly synchronized.

All you need to do is edit /media/data/local/etc/timezone, and look up the following.
Whatever is the closest city, you copy the string to that, save the timezone file, and test it using GCW Connect.

NORTH AMERICA
Hawaii Time
HAW10
Alaska Time
AKST9AKDT
Pacific Time
PST8PDT
Mountain Time
MST7MDT
Mountain Time (Arizona, no DST)
MST7
Central Time
CST6CDT
Eastern Time
EST5EDT
Atlantic Time
AST4ADT

---

CENTRAL / SOUTH AMERICA
Central America
CST+6
Sao Paulo, Brazil
BRST+3BRDT+2,M10.3.0,M2.3.0
Argentina
UTC+3

---

EUROPE
Amsterdam, Netherlands
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Athens, Greece
EET-2EEST-3,M3.5.0/03:00:00,M10.5.0/04:00:00
Barcelona, Spain
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Berlin, Germany
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Brussels, Belgium
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Budapest, Hungary
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Copenhagen, Denmark
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Dublin, Ireland
GMT+0IST-1,M3.5.0/01:00:00,M10.5.0/02:00:00
Geneva, Switzerland
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Helsinki, Finland
EET-2EEST-3,M3.5.0/03:00:00,M10.5.0/04:00:00
Kyiv, Ukraine
EET-2EEST,M3.5.0/3,M10.5.0/4
Lisbon, Portugal
WET-0WEST-1,M3.5.0/01:00:00,M10.5.0/02:00:00
London, England
GMT+0BST-1,M3.5.0/01:00:00,M10.5.0/02:00:00
Madrid, Spain
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Oslo, Norway
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Paris, France
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Prague, Czech Republic
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Rome, Italy
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00
Moscow, Russia
MSK-3MSD,M3.5.0/2,M10.5.0/3
St. Petersburg, Russia
MST-3MDT,M3.5.0/2,M10.5.0/3
Stockholm, Sweden
CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00

---

ASIA
Jakarta
WIB-7
Jerusalem
GMT+2
Singapore
SGT-8
Ulaanbaatar, Mongolia
ULAT-8ULAST,M3.5.0/2,M9.5.0/2

---

AUSTRALIA & NEW ZEALAND
Melbourne, Canberra, Sydney
EST-10EDT-11,M10.5.0/02:00:00,M3.5.0/03:00:00
Perth
WST-8
Brisbane
EST-10
Adelaide
CST-9:30CDT-10:30,M10.5.0/02:00:00,M3.5.0/03:00:00
Darwin
CST-9:30
Hobart
EST-10EDT-11,M10.1.0/02:00:00,M3.5.0/03:00:00
Auckland, Wellington
NZST-12NZDT-13,M10.1.0/02:00:00,M3.3.0/03:00:00

---

SOURCE: http://www.remotemonitoringsystems.ca/time-zone-abbreviations.php

This should be in the FAQ or Quickstart guide.

It is not at all obvious to the new user where this particular Linux distribution buries its timezone info or what that info should be. I just got my GCW0 yesterday and found this post helpful.