Casio 3122 Operation Manual Download Page 3

3

Operation Guide 3122

World Time

The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.

All World Time Mode times are calculated from the current Home City time in the
Timekeeping Mode using UTC time differential values.

The UTC differential is a value that indicates the time difference between a
reference point in Greenwich, England and the time zone where a city is located.

The letters “UTC” is the abbreviation for “Universal Time Coordinated”, which is the
world-wide scientific standard of timekeeping. It is based upon carefully maintained
atomic (cesium) clocks that keep time accurately to within microseconds. Leap
seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s
rotation.

City Code Table

City

City

UTC

Other major cities in same time zone

Code

Differential

Pago Pago

Honolulu

Anchorage
Vancouver

San Francisco

Los Angeles

Denver

Mexico City

Chicago

Miami

New York

Caracas

St. Johns

Rio De Janeiro

Praia

Lisbon

London

Barcelona

Paris
Milan

Rome
Berlin

Athens

Johannesburg

Istanbul

Cairo

Jerusalem

Moscow

Jeddah
Tehran

Dubai
Kabul

Karachi

Male

Delhi

Dhaka

Yangon

Bangkok

Singapore

Hong Kong

Beijing

Seoul

Tokyo

Adelaide

Guam

Sydney

Noumea

Wellington

–11.0
–10.0
–09.0
–08.0

–07.0
–06.0

–05.0

–04.0
–03.5
–03.0
–01.0
+00.0

+01.0

+02.0

+03.0

+03.5
+04.0
+04.5
+05.0

+05.5
+06.0
+06.5
+07.0
+08.0

+09.0

+09.5
+10.0

+11.0
+12.0

Papeete
Nome
Las Vegas, Seattle/Tacoma, Dawson City

El Paso, Edmonton
Winnipeg, Houston, Dallas/Fort Worth, New Orleans

Montreal, Detroit, Boston, Panama City, Havana, Lima,
Bogota
La Paz, Santiago, Port Of Spain

Sao Paulo, Buenos Aires, Brasilia, Montevideo

Dublin, Casablanca, Dakar, Abidjan

Amsterdam, Algiers, Hamburg, Frankfurt, Vienna,
Stockholm, Madrid

Helsinki, Beirut, Damascus, Cape Town

Kuwait, Riyadh, Aden, Addis Ababa, Nairobi

Shiraz
Abu Dhabi, Muscat

Mumbai, Kolkata, Colombo

Jakarta, Phnom Penh, Hanoi, Vientiane
Kuala Lumpur, Taipei, Manila, Perth, Ulaanbaatar

Pyongyang

Darwin
Melbourne, Rabaul

Port Vila
Christchurch, Nadi, Nauru Island

PPG
HNL
ANC
YVR
SFO

LAX

DEN
MEX

CHI
MIA

NYC
CCS

YYT

RIO

RAI

LIS

LON
BCN
PAR

MIL

ROM

BER
ATH

JNB

IST
CAI

JRS

MOW

JED

THR
DXB

KBL

KHI

MLE

DEL

DAC
RGN
BKK

SIN

HKG

BJS
SEL

TYO

ADL

GUM

SYD

NOU
WLG

*Based on data as of December 2006.

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