Since we have customers in many countries, we should support countries and their time zones. 
AN(config)#system time zone
Select the continent (Enter the corresponding number or 0 to exit):
Asia
Europe
North America
Oceania
Africa
time-zone-shell> 1

*** The newly listed counties has been confirmed by support team. If any other countries needed we can file ticket and fix later.
https://arraynetworks.atlassian.net/wiki/spaces/PD/pages/1954316300/New+time+zone+support

IDBI_Demo(config)#system timezone
Select the continent (Enter the corresponding number or 0 to exit):

  1.   Asia

  2.   Europe

  3.   North America

  4.   Oceania

  5.   Africa
time-zone-shell> 1
Select the continent (Enter the corresponding number or 0 to exit):

  1.   Asia

  2.   Europe

  3.   North America

  4.   Oceania

  5.   Africa
time-zone-shell> 1
Select the country/region (Enter the corresponding number or 0 to move up one level):

  1.   Afganistan

  2.   Armenia

  3.   Azerbaijan

  4.   Beirut

  5.   Bangladesh

  6.   Bahrain

  7.   Bhutan

  8.   Brunei

  9.   China

 10.   Cambodia

 11.   Cyprus

 12.   Georgia

 13.   India

 14.   Indonesia

 15.   Iraq

 16.   Iran

 17.   Japan

 18.   Jordan

 19.   Kazakhstan

 20.   Kyrgyzstan

 21.   Kuwait

 22.   Macao

 23.   Malaysia

 24.   Myanmar

 25.   Mongolia

 26.   Nepal

 27.   North Korea Republic

 28.   Pakistan

 29.   Philippines

 30.   Palestine

 31.   Oman

 32.   Saudiarabia

 33.   South Korea

 34.   Singapore

 35.   Syria

 36.   Srilanka

 37.   Tajikistan

 38.   Thailand

 39.   Taiwan

 40.   Turkmenistan

 41.   Timor-Leste

 42.   Vietnam

 43.   United Arab Emirates

 44.   Uzbekistan

 45.   Yemen

 46.   Qatar
time-zone-shell> 0
Select the continent (Enter the corresponding number or 0 to exit):

  1.   Asia

  2.   Europe

  3.   North America

  4.   Oceania

  5.   Africa
time-zone-shell> 2
Select the country/region (Enter the corresponding number or 0 to move up one level):

  1.   Austria

  2.   Belgium

  3.   Denmark

  4.   France

  5.   Finland

  6.   Germany

  7.   Greece

  8.   Hungary

  9.   Israel

 10.   Italy

 11.   Ukraine

 12.   Russia

 13.   Netherland

 14.   Norway

 15.   Spain

 16.   Sweden

 17.   Switzerland

 18.   United Kingdom

 19.   Portugal

 20.   Turkey
time-zone-shell> 0
Select the continent (Enter the corresponding number or 0 to exit):

  1.   Asia

  2.   Europe

  3.   North America

  4.   Oceania

  5.   Africa
time-zone-shell> 3
Select the country/region (Enter the corresponding number or 0 to move up one level):

  1.   Canada

  2.   United States
time-zone-shell> 0
Select the continent (Enter the corresponding number or 0 to exit):

  1.   Asia

  2.   Europe

  3.   North America

  4.   Oceania

  5.   Africa
time-zone-shell> 4
Select the country/region (Enter the corresponding number or 0 to move up one level):

  1.   Australia

  2.   New Zealand

  3.   Samoa

  4.   Fiji

  5.   Honolulu
time-zone-shell> 0
Select the continent (Enter the corresponding number or 0 to exit):

  1.   Asia

  2.   Europe

  3.   North America

  4.   Oceania

  5.   Africa
time-zone-shell> 5
Select the country/region (Enter the corresponding number or 0 to move up one level):

  1.   Algeria

  2.   Angola

  3.   Benin

  4.   Burkina Faso

  5.   Burundi

  6.   Bangui

  7.   Cameroon

  8.   Congo

  9.   Djibouti

 10.   Equatorial Guinea

 11.   Eritrea

 12.   Ethiopia

 13.   Egypt

 14.   Morocco

 15.   Gabon

 16.   Gambia

 17.   Ghana

 18.   Guinea

 19.   Guinea-Bissau

 20.   Ivory Coast

 21.   Namibia

 22.   Nigeria

 23.   Niger

 24.   Mali

 25.   Mozambique

 26.   Mauritania

 27.   Blantyre

 28.   Kenya

 29.   Senegal

 30.   South Africa

 31.   Sudan

 32.   South Sudan

 33.   Togo

 34.   Tunis

 35.   Uganda

 36.   Zambia
time-zone-shell>