UPSC Prelims 2025Question 76International Relations

Consider the following countries:
I. United Kingdom
II. Denmark
III. New Zealand
IV. Australia
V. Brazil
How many of the above countries have more than four time zones?

Options

(a)All the five
(b)Only four
(c)Only three
(d)Only two

Correct answer: d

Decision rule

Count time zones including overseas territories: a compact country with scattered dependencies outranks a wide contiguous one; exactly four fails more-than-four.

Explanation

Correct Answer:

(d) Only two

Explanation of the Correct Answer

To determine how many of the listed countries have more than four time zones, we must consider both continental and overseas territories (if applicable). Here's the analysis:

Country-wise Time Zone Analysis

I. United Kingdom

Time Zones (including territories): Yes, more than 4
The UK itself (Great Britain and Northern Ireland) is in GMT / BST.
However, it has numerous overseas territories (e.g., Bermuda, Falklands, British Indian Ocean Territory, etc.) spanning multiple time zones.
Total Time Zones (incl. territories): 9
Included

II. Denmark

Time Zones (including Greenland and Faroe Islands):
- Mainland Denmark: CET (UTC+1)
- Greenland has several time zones: from UTC−4 to UTC+0
Combined, Denmark spans 5 time zones (with Greenland and dependencies).
Included

III. New Zealand

New Zealand mainland: UTC+12 / UTC+13 (DST)
Dependencies:
- Cook Islands (UTC−10)
- Niue (UTC−11)
- Tokelau (UTC+13)
Combined: 3 time zones
Not included

IV. Australia

Has 3 official mainland time zones:
- AWST (UTC+8), ACST (UTC+9:30), AEST (UTC+10)
With external territories (e.g., Lord Howe Island, Norfolk Island, Christmas Island), it may appear to have more.
But technically, Australia has 3 to 5, depending on definitions, but not more than 4 consistently.
Not included

V. Brazil

Brazil covers:
- UTC−2, UTC−3, UTC−4, UTC−5
So, 4 time zones, not more than 4
Not included

Why Other Options Are Incorrect

(a) All the five – Incorrect: Only UK and Denmark have more than 4.
(b) Only four – Incorrect: Only 2 qualify.
(c) Only three – Incorrect: Only 2 qualify.
(d) Only two – Correct: Only UK and Denmark have more than 4 time zones, considering their territories.

Relevant Supplementary Information

Table: Time Zones by Country (including territories)

Country	Time Zones	Includes Territories?	More than 4?
United Kingdom	9	Yes	Yes
Denmark	5	Yes (Greenland etc.)	Yes
New Zealand	3	Yes	No
Australia	3–5	Yes	No
Brazil	4	No overseas territories	No

Related Concepts

Concept	Explanation
Time Zone	A region of the globe that observes a uniform standard time for legal, commercial, and social purposes.
DST (Daylight Saving Time)	Temporarily advancing clocks during warmer months to extend evening daylight.
Overseas Territories	Non-contiguous regions or islands governed by a country, often spanning distant time zones.

Table: Related Concepts and Terms – Time Zones & Country Geography

Concept / Term	Explanation / Relevance
Time Zone	A region of the Earth that observes the same standard time; generally set at intervals of 15° longitude (1 hour each).
Standard Time	The official time adopted by a country or region; often differs from local solar time.
Daylight Saving Time (DST)	Practice of advancing clocks during warmer months to extend evening daylight; used in UK, not in India.
Overseas Territories	Non-contiguous land areas governed by a country; often located in different parts of the world, hence in different time zones (e.g., UK, France).
Greenland (Denmark)	Autonomous territory of Denmark; spans multiple time zones from UTC−4 to UTC+0.
British Overseas Territories	Include Bermuda, Falklands, British Indian Ocean Territory, etc.; give UK multiple time zones.
Time Zones in Australia	Australia officially has 3 mainland time zones; additional minor variations for territories (e.g., Lord Howe Island).
Brazil Time Zones	Brazil spans 4 time zones from UTC−2 to UTC−5; no overseas territories.
International Date Line	Imaginary line at ~180° longitude where date changes by one day; relevant for time zone boundaries.
Political Geography	Study of how territorial governance (e.g., overseas territories) affects geographic and temporal parameters like time zones.

Table: Major Countries with More Than 4 Time Zones (Including Territories)

Country	Approx. Number of Time Zones	Includes Territories?	Notable Territories / Zones
France	12	Yes	Guadeloupe, Réunion, New Caledonia, French Guiana, Polynesia, etc.
Russia	11	No (mainland only)	From Kaliningrad (UTC+2) to Kamchatka (UTC+12)
United States	11	Yes	Alaska, Hawaii, Guam, Puerto Rico, US Virgin Islands, Samoa
United Kingdom	9	Yes	Bermuda, Falklands, Gibraltar, British Indian Ocean Territory, etc.
Australia	5–6	Yes	Mainland zones + territories (Lord Howe, Norfolk Island, etc.)
Denmark	5	Yes	Greenland (multiple zones), Faroe Islands
Canada	6	No (mainland only)	Newfoundland (UTC−3:30) to Pacific Time (UTC−8)
New Zealand	3–4	Yes	Cook Islands (UTC−10), Niue (UTC−11), Tokelau (UTC+13)
Brazil	4	No	UTC−2 (Fernando de Noronha) to UTC−5 (Acre)
Indonesia	3	No	Western (UTC+7), Central (UTC+8), Eastern (UTC+9)

Key Notes:

France has the most time zones globally due to its widespread overseas territories.
Russia has the most time zones on a single contiguous landmass (mainland only).
The count varies depending on whether overseas territories are included.

Definitions

Term	Explanation
Mainland Time Zones	Time zones across the contiguous or primary landmass of a country.
Overseas Territories	Distant or non-contiguous regions under a country's jurisdiction, often in different time zones.
Nominal Time Zones	Officially adopted time zones, which may differ from solar time.

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Consider the following countries:I. United KingdomII. DenmarkIII. New ZealandIV. AustraliaV. BrazilHow many of the above countries have more than four time zones?