Seiko QC-5500 Series User manual

QUARTZ MASTER CLOCK
QC-5500 Series
Thank you for purchasing SEIKO Quartz Master Clock QC-5500
Series.
Before using your SEIKO Quartz Master Clock, please be sure to
carefully read through this manual as it has been designed to provide
you with information for correct handling, use and maintenance
necessary for safe, long-lasting and trouble-free operation. Keep this
manual handy for ready reference.

－CAUTION－
(1) This manual is the property of SEIKO and may not without the express written consent of SEIKO be
copied or reproduced in any form, in whole or in part, or used for any purpose other than that for
which it is supplied.
(2) This manual may be subject to change without notice.
(3) This manual has been prepared to give complete information necessary for the operation, use,
handling and maintenance of QUARTZ MASTER CLOCK . For the purpose of our constant
technical manual improvement program, your questions, advice, suggestions and comments on the
descriptions, illustrations, procedures or any matter concerning this manual are highly appreciated.
(4) SEIKO shall have no liability to the user in respect of any loss or damages, whether consequential
or incidental, sustained by the user if such loss or damages are:
1) due to abuse, misuse, failure to observe instructions given in the manual furnished by SEIKO
and neglect of other reasonable care and servicing due to be done by the user irrespective of
such instructions, and failure due to deliberate actions or gross negligence or accident;
2) caused by changes, modifications, or alterations made without prior written consent of SEIKO
or by any person other than authorized by SEIKO; or,
3) due to negligence on the part of the user of what should be done or should not be done as a
good caretaker of Model QC-5500 Series Quartz Master Clock .
－ SAFETY ALERT SYMBOLS －
The symbols and terms used in this manual have the meaning as explained below:
DANGER
DANGER is used to indicate the presence of an imminent
hazard which is likely to cause severe personal injury, death,
or substantial property damage if the instructions under this
heading are ignored.
WARNING
WARNING is used to indicate such operational procedures,
practices, or situations that may result in severe personal
injury or loss of life if relevant instructions are not followed
correctly.
The following pictorial symbols indicate what must NOT be done.
The following pictorial symbols indicate what must be done.
General
prohibitions
Prohibition
against
disassembly/
tampering
Prohibition
against
exposure to
water
Prohibition
against touch
General
instructions
Connection of
grounding
conductor

CONTENTS
1. SAFETY PRECAUTIONS 1
2. OVERVIEW 4
3. FEATURES 4
4. ACCESSORIES AND SPARES 4
5. LIST OF PRODUCTS 5
6. NOMENCLATURE AND FUNCTIONS (FRONT PANEL) 6
7. NOMENCLATURE AND FUNCTIONS (INSIDE PARTS) 7
8. TIME/CALENDAR CHECKING 8
8.1 Powering-Up 8
8.2 Time/Calendar Checking 8
8.3 Time Setting of Monitor Clocks 9
9. NORMAL MODE 10
10. SETTING MODE 11
10.1 Time/Calendar Setting 11
10.2 Daylight Saving Time (Summer Time) Setting 13
10.3 Time difference setting 16
11. TIME CORRECTION WITH GNSS 17
12. QC-5500 Series I/F 18
12.1 Serial Output Signal 18
13. POWER LED 19
14. INSTALLATION 20
14.1 Precautions on Installation 20
14.2 Installation Work 21
14.3 Precautions on Wiring and Installation of Secondary Clocks 21
14.4 Connection of Power Supply and Secondary Clocks 22
14.5 Connection of External Synchronization Input 23
14.6 External DC Power Supply Input (DC 24 V) 23
14.7 Connection of Battery 24
14.8 Grounding 24
14.9 Connection of GNSS Receiver 25
15. TROUBLES YOU CAN SOLVE YOURSELF 26
16. BATTERY REPLACEMENT 27
17
. REMARKS ON DAILY CARE AND MAINTENANCE
28
17.1 Replacement of Fuse 28
17.2 Care of Enclosure 28
18. WARRANTY 28
19. SPECIFICATIONS 29
[QC-5500 Series Quartz Master Clock] 29
[Option] 29

1
1. SAFETY PRECAUTIONS
The following precautions must be strictly observed for the safety of yourself and your fellow
workers and for the protection of property from loss and damages.
●Safety instructions to the customer
DANGER
Prohibition
against
unauthorized
installation and
electrical
engineering work
Never attempt any of installation work, electrical engineering, and any of the
jobs instructed to the engineering outfit ("For the engineering outfit
"). All of
these jobs must always be commissioned to your engineering outfit because
they involve electric shock hazards, fire hazards and falling hazards.
WARNING
Selection of
installation
location
The Quartz Master Clock
is designed for indoor use, and must not be installed
outdoors. Otherwise, rainwater may infiltrate into the product to cause electric
shock or fire accident.
It must not be installed in
the bathroom or washing area or other damp places,
either. This may cause fire or electric shock hazard.
Actions to be
taken in case of
troubles
If the Quartz Master Clock
is giving out smoke or burnt smell, or showing other
abnormal
symptoms, turn off the power switch and cut the power supply
immediately. Then, call your nearby SEIKO dealer or agent for repair service.
If the Quartz Master Clock
is used again without being reconditioned, an electric
shock or fire may result.
Prohibition against
unauthorized
disassembly,
repair or
modification
For repair service, contact your nearby SEIKO dealer or agent. Unauthorized
disassembly, repair or modification may cause electric shock accidents or fire
accidents.
Operating
precautions
When setting the time of each monitor, do not touch any control unit other than
specified. Otherwise, an electric shock may result.
Prohibition
against wetting
with liquids
(water,
chemicals)
Never immerse the
Quartz Master Clock
into water or any other liquid, or never expose
it to splashes of water or any other liquid. Should any water or liquid enter into it, turn off
the power switch and cut the power supply immediately. Then call your SEIKO deal
er or
agent for inspection and servicing. If the
Quartz Master Clock
is used again without
being reconditioned, an electric shock or fire may result.
Prohibition
against handling
with wet hands
Never operate the Quartz Master Clock or
POWER switch with wet hands.
Otherwise, an electric shock may result.
Handling of
power cord
When plugging and unplugging the power cord, do not pull the cord, but hold the
plug. Otherwise, it may be damaged to cause fire or electric
shock hazard.
(For models with a power plug)
Handle the power cord with care not to damage it. Never load it with a heavy
object. Never bend over it unduly. All these could lead to an electric shock or
fire accident.
Never use the damaged power cord or plug, or loose socket. This may cause
fire or electric shock hazard.

2
WARNING
Power supply
Be sure to use only the rated voltage with the Quartz Master Clock.
If any
other power supply than specified is used
, electric shock or fire accident may
result.
Confirmation of
grounding
Check to see if a grounding conductor is terminated to the Quartz Master Clock
.
If it is not grounded, electric shock acci
dent may result when it gets faulty or
leaky. The grounding work is required to be of Class D or higher rating, and shall
be undertaken by a licensed electrician.
Prohibition
against
unauthorized
fuse
replacement
For fuse replacement s
ervice, contact your SEIKO dealer or agent. Do not
attempt the fuse replacement by
yourself unless you are qualified for the job.
Otherwise, an electric shock accident may result.
Replacement
and collection
of Ni-Cd battery
For replacement and collection of the built-in Ni-
Cd battery, contact your SEIKO
dealer or agent. Do not attempt the battery replacement by
yourself.
Otherwise, an electric shock accident may result.
Precautions on
the servicing of
casing
Bef
ore cleaning the surface of the casing, be sure to cut the power supply.
Otherwise, an electric shock accident may result.
Prohibition
against
unauthorized
servicing of the
internal
components
For the servicing of internal components,
contact your SEIKO dealer or agent.
Do not attempt to do the servicing yourself unless you are qualified for the job.
Otherwise, an electric shock accident may result.

3
●Safety instructions to the engineering outfit
WARNING
Precautions on installation work
Selection of
installation
location
The Quartz Master Clock
is designed for indoor use, and must not be installed
outdoors. Otherwise, rainwater may infiltrate into it
to cause electric shock or
fire accident.
Do not install it in the bathroom,
washing area or other damp places, either.
This may cause fire or electric shock hazard.
Load-bearing
capacity
Make sure that the wall or other structure onto which the
product is to be
mounted has a sufficient strength to bear up against the load of the product.
If
the wall strength is not sufficient, it may yield under wind pressure and
vibrations, letting fall the product to cause fatal accidents.
Mounting onto
the concrete
wall
When mounting on to the concrete wall, use AY plug bolts
. Never use wood
screws to fasten the product. Wood screws may yield under wind pressure and
vibrations, and let fall the product to cause fatal accidents.
Tightening of
bolts
Be sure to tighten each installation bolt
. Otherwise, the product may come off
from the wall as the bolts
may loosen off under the influence of wind pressure or
vibrations, causing fatal accidents.
Fixing of stay
When opening the front panel, fix the stay securely to keep the panel open.
Otherwise, the front panel will be closed by touching it accidentally,
causing a
malfunction of the product as well as fatal accidents.
Electrical
engineering
work
Before wiring the input/output terminal blocks, make sure that no AC voltage is
supplied, and that the battery is not connected. You are warned against
working on live circuits as they involve fatal electric shock hazards.
Grounding work
Ground the Quartz Master Clock
by connecting a grounding conductor to its
grounding terminal. This is important for the prevention of electric shock hazards
in case of troubles such as earth leakage fault. The grounding work must be
Class D or higher in rating.
Installation of
terminal board
cover
After wiring the input/output terminal blocks, be sure to replace the terminal
board cover for the protection of operators against electric shock.
Power supply
Be sure to use only the rated voltage with the Quartz Master Clock
. If any
other power supply than specified is used, an electric shock or a fire will be
caused.
Connection of
battery
Connect the battery after
all the installation and electrical works are completed.
Before connecting the battery, make sure that the power is not supplied to the
product. Otherwise, an electric shock may result.
Replacement of
battery Be sure to use only the specified battery with the Quartz Master Clock.
Replacement of
fuse
When the fuse was melted and needs to be replaced, first, locate and remove
the cause, check that the power switch is turned off, and then, replace it with a
specified fuse. Otherwise, an electric shock or a fire will be caused.
For the engineering outfit

4
2. OVERVIEW
SEIKO QC-5500 Series is a high-precision quartz master clock equipped with a wide variety of
functions that meet the needs of the users, such as synchronization output via RS-422 and daylight
saving time setting. Models operating on AC 110 V (QC-55X01) and AC 220 V (QC-55X02) are
available.
By connecting the GNSS Receiver (GNS-300) for exclusive use with QC-5500 Series, the internal
clock can be adjusted automatically on a regular basis.
3. FEATURES
(1) Master clock function (QC-5510X, QC-5520X and QC-5530X)
Up to 30 secondary clocks can be connected to each channel (if the current consumption of
each secondary clock is 12 mA).
(2) External synchronization function
By connecting with an external master clock generating 30-sec polarized signal output, the
loss/gain of the clock is corrected automatically.
(3) Time correction function
By connecting with the GNSS Receiver (GNS-300), the time correction is made automatically.
4. ACCESSORIES AND SPARES
Accessories and Spares Quantity Remarks
Plastic foot 4 pieces
Miniature fuse 3 pieces 250V, 2A
Insulated crimp terminal See “Remarks”
column.
QC-55101, QC-55102: M4, 10 pieces; M3, 6 pieces
QC-55201, QC-55202: M4, 12 pieces; M3, 6 pieces
QC-55301, QC-55302: M4, 14 pieces; M3, 6 pieces
Instruction manual 1 copy
Mounting hole drilling
template 1 sheet

5
5. LIST OF PRODUCTS
*By using optional metal fittings E354/E442, the Quartz Master Clock can be mounted in a rack.
QC-55201
Drives up to 60
secondary clocks
QC-55202
Drives up to 60
secondary clocks
QC-55301
Drives up to 90
secondary clocks
QC-55302
Drives up to 90
secondary clocks
Models with 3 secondary clock circuits
Models with 2 secondary clock circuits
QC-55101
Drives up to 30
secondary clocks
QC-55102
Drives up to 30
secondary clocks
Models with 1 secondary clock circuit

6
6. NOMENCLATURE AND FUNCTIONS (FRONT PANEL)
Ex.) QC-55202
Power LED
Moves hands at 30-sec steps to indicate
current time.
Also serves as a secondary clock monitor for
QC-5510X Series.
Sets and stops hands of master
clock.
Sets hands of all secondary clocks
simultaneously.
Monitors for secondary clocks of
channel No.1 (left) and No.2.
No secondary clock monitor is
provided for QC-5510X Series.
Secondary clock monitor
Hand adjuster switch for
secondary clock monitor
Sets and stops hands of
secondary clocks.
Hand adjuster switch for
master clock monitor
Master clock monitor

7
7. NOMENCLATURE AND FUNCTIONS (INSIDE PARTS)
By turning a wheel on rear
side with fingers, hands of
secondary clock monitor
can be adjusted.
Be sure to connect a
grounding conductor
to grounding terminal.
Operation panel
Reset switch
Malfunction lamp
Secondary clock
monitor
Grounding
terminal Power fuse
Turns ON/OFF AC power
supply.
Input/output
terminal block
From top to bottom
F1, F2：2A for AC
power supply
F3
：
2A for
battery
Stay
Keeps front panel open
during installation and wiring
Lights up when output line
of secondary clock is
short-circuited.
Goes out by pressing reset
switch.
Battery
Power switch

8
8. TIME/CALENDAR CHECKING
8.1 Powering-Up
Open the front panel, and set the power switch to “ON”.
Once the power switch is turned OFF, wait at least for 10 seconds, and then, set the switch to “ON”
again,
8.2 Time/Calendar Checking
Check the time and calendar shown on the LCD display of the operation panel.
If the current time/calendar is not shown, set the correct time/calendar, following the procedure in
“10.1 Time/calendar setting”.
Note:
The external synchronization signal can correct the loss/gain within the
range of 15 seconds. If the clock loses or gains beyond this range, the
time correction will not be made.
Before using the Quarts Master Clock, be sure to set the correct time on
the clock.
Note:
Please note that, if the power switch is turned ON and OFF in succession in
a short time, a malfunction will be caused, or the hands will be mis-aligned.

9
8.3 Time Setting of Monitor Clocks
(1) Set the hand adjuster switches for all the monitor clock to
“STOP”.
(2) Set the times of all the clock monitors and secondary clocks to
an identical time.
To set the time of the master clock monitor, open the movement
cover, and turn the wheel with fingers.
To set the time of the secondary clock monitor, turn the wheel on its
rear.
WARNING
When setting the time of each monitor, do not touch any
other
part of the
control unit than specified. Otherwise, an electric
shock may result.
(3) Set the time of the clock monitors and secondary clocks to that of digital display.
Set the hand adjuster switches for all the secondary clock monitors to “NOR.”
(When the hand adjuster switches for the secondary clock monitors are set at “NOR.”, the secondary clock
monitor moves correspondingly with the master clock monitor. While the hand adjuster switch of the
master clock monitor is set at “STOP”, the secondary clock monitor stops moving.)
Set the hand adjuster switch of the master clock monitor to “ADJ.” Hands of all the clock
monitors start moving quickly.
When the hands indicate the time shown on the digital display, set the hand adjuster switch of
the master clock monitor to “NOR.”
Master clock monitor
Secondary clock monitor

10
9. NORMAL MODE
“Normal Mode” refers to the mode where the Quartz Master Clock is normally used as opposed to
the “Setting Mode” where setting of the digits is made.
In the Normal Mode, the normal movement of the hands of the secondary clocks, time correction,
output of various signals, and other functions are performed.
With each press of MODE button on the operation panel in the Normal Mode, the indication of
the LCD display changes in the following order.
Note:
This Quartz Master Clock does not support time correction function by
means of FM radio wave and standard radio wave.
Though such indications are displayed, the clock is not equipped with the
corresponding functions.
GNSS
Time difference setting
日付・時刻
Time/calendar
サマータイム開始
Start of daylight saving time
サマータイム終了
End of daylight saving time
ラジオ周波数
Radio wave frequency
バージョン
Version
of clock system
時刻修正経過時間
Time elapsed from the previous correction

11
10. SETTING MODE
10.1 Time/Calendar Setting
When the LCD display does not indicate the correct time/calendar, adjust it manually.
By pressing SET button when the time/calendar is shown on the display in the Normal Mode,
the time/calendar setting function is activated.
Set the flashing digits in order of Year, Month, Date, Hour, and Minute. Then, when the Second
digits are flashing, press SET button in accordance with a time signal for “00”seconds.
The day of the week is automatically calculated from the Year, Month and Date you have set.
When the respective digits are flashing, the buttons works as follows:
(1) Year setting
MODE Pressing the button while the Year digits are flashing will return the display to
the Normal Mode.
All the digits you have been setting will be cancelled.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
Up to “99” (the year 2099) can be set. After “99”, the digits will return to
“00” (the year 2000).
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
The digits are decreased down to “00” (the year 2000). After “00”, “99” (the
year 2099) will appear.
SET The Month digits will start flashing.
(2) Month setting
MODE Pressing the button will return the flashing digits from Month to Year.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Date digits will start flashing.

12
(3) Date setting
MODE Pressing the button will return the flashing digits from Date to Month.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Hour digits will start flashing.
(4) Hour setting
MODE Pressing the button will return the flashing digits from Hour to Date.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Minute digits will start flashing.
(5) Minute setting
MODE Pressing the button will return the flashing digits from Minute to Hour.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Second digits will start flashing.
(6) Second setting
MODE Pressing the button will return the flashing digits from Second to Minute.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are decreased
quickly by keeping it pressed.
SET Press the button in accordance with at time signal for “00”seconds. The
time and calendar you have set will be registered in the internal clock memory,
and the clock will return to the Normal Mode.
Note:
The external synchronization signal can correct the loss/gain within the
range of 15 seconds. If the clock loses or gains beyond this range, the
time correction will not be made.
Before using the Quarts Master Clock, be sure to set the correct time on
the clock.

13
10.2 Daylight Saving Time (Summer Time) Setting
By setting the start and end of the period during which the daylight saving time is in effect, the
clocks automatically indicate the time one hour ahead of normal time during the period. Press
MODE button to show “Start of daylight saving time” or “End of daylight saving time” while in the
Normal Mode, and press SET button to activate the respective setting function.
Figs. 10. 2. 2 and 10. 2. 3 show the example in which the following daylight saving time period has
been set.
Period during which the daylight saving time is in effect:
From 2:00 AM on Sunday, March 30, 2008 to 3:00 AM on Sunday, September 28, 2008
Clock indication after the above setting: (All the clock monitors and secondary clocks are
automatically adjusted to indicate the daylight saving time from normal time and vice versa.)
“Start time of daylight saving
time” display:
Before setting digits, only
“-“
marks are displayed.
This also holds true in the
case of “End of daylight
saving time” display.
Start of daylight saving time
has been set.
The lower row (  ) shows the
start date of the daylight
saving time.
End of daylight saving time
has been set.
The lower row (  ) shows the
end date of the daylight
saving time.
2008/3/30 (Sun)
01:59:59 →03:00:00
2008/9/28 (Sun)
02:59:59 →02:00:00
図１０．２．１
図１０．２．２
図１０．２．３
Fig. 10. 2. 1
Fig. 10. 2. 2
Fig. 10. 2. 3

14
Set the flashing digits in order of Year, Month, Date and Hour of “Start of daylight saving time”, and,
Month, Date and Hour of “End of daylight saving time”.
(1) Start Year setting
MODE Pressing the button while the Start Year digits are flashing will return the
display to the Normal Mode.
All the digits you have been setting will be cancelled, and the previous
setting will remain.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Month digits will start flashing.
(2) Start Month setting
MODE Pressing the button will return the flashing digits from Month to Year.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Date digits will start flashing.
(3) Start Date setting
MODE Pressing the button will return the flashing digits from Date to Month.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Hour digits will start flashing.
(4) Start Hour setting
MODE Pressing the button will return the flashing digits from Hour to Date.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Month digits of End of daylight saving time will start flashing.

15
(5) End Month setting
MODE Pressing the button will return the flashing digits from End Month to Start
Hour.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Date digits will start flashing.
(6) End Date setting
MODE Pressing the button will return the flashing digits from Date to Month.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The Hour digits will start flashing.
(7) End Hour setting
MODE Pressing the button will return the flashing digits from Hour to Date.
＋With each press of the button, one digit is advanced. The digits are
advanced quickly by keeping it pressed.
－With each press of the button, one digit is decreased. The digits are
decreased quickly by keeping it pressed.
SET The daylight saving time setting you have made will be registered in the
internal clock memory, and the clock will return to the Normal Mode.
Note:
During the period for which the daylight saving time has been set, the
clocks indicate the time one hour ahead of the normal time.
The digital display will be adjusted as soon as the daylight saving time is
in effect, but it takes some time for the clock monitors and secondary
clock to be adjusted accordingly (the time required for this adjustment
differs depending on the type of secondary clock).

16
10.3 Time Difference Setting
UTC (Coordinated Universal Time) is the international standard time that corresponds to the time of the
United Kingdom when the daylight saving time is not in effect.
Set the time difference of the country or city where the Quartz Master Clock is used.
The time difference can be set within the range from “-12:00” to “+12:00” at 15-minute intervals.

Time difference setting
MODE Pressing the button while in the Setting Mode will return the display to the Normal
Mode. All the digits you have been setting will be cancelled, and the time
difference previously set will remain.
＋With each press of the button, the time difference is increased by 15 minutes.
The digits are advanced quickly by keeping it pressed.
－With each press of the button, the time difference is decreased by 15 minutes.
The digits are advanced quickly by keeping it pressed.
SET Pressing the button while in the Normal Mode will activate the time difference
setting function. In the Setting Mode, press it to register the time difference you
have set. The clock will return to the Normal Mode.
[For reference] List of Time Differences (when DST is not in effect)
City Country Time difference
Sydney Commonwealth of Australia
+10:00
Tokyo Japan
+09:00
Beijin, Hong Kong
Manila
Singapore
People's Republic of China
Republic of the Philippines
Republic of Singapore
+08:00
Bangkok
Jakarta
Kingdom of Thailand
Republic of Indonesia
+07:00
New Delhi Republic of India
+05:30
Abu Dhabi, Dubai
Moscow
United Arab Emirates
Russian Federation
+04:00
Manama
Kuwait
Riyadh
Kingdom of Bahrain
State of Kuwait
Kingdom of Saudi Arabia
+03:00
Cairo
Johannesburg
Helsinki
Arab Republic of Egypt
Republic of South Africa
Republic of Finland
+02:00
Berlin
Madrid
Oslo
Paris
Rome
Stockholm
Federal Republic of Germany
Kingdom of Spain
Kingdom of Norway
French Republic
Italian Republic
Kingdom of Sweden
+01:00
London United Kingdom
00:00
Rio de Janeiro Federative Republic of Brazil
-03:00
Montreal
New York
Canada
United States of America -05:00
Los Angeles, San Francisco United States of America -08:00
Honolulu United States of America -10:00