Baker Island and Howland Island, These are the last places on Earth to experience any calendar date.

The islands are uninhabited, so UTC−12 is used only for: Aviation/navigation purposes, Scientific, and Military

American Samoa, Niue, Midway Atoll (U.S.), Parts of U.S. Minor Outlying Islands

Hawaii-Aleutian Standard Time – Hawaii, Cook Islands, Tahiti (French Polynesia)

Alaska Standard Time – Anchorage, Gambier Islands (French Polynesia)

Pacific Time (PT) – Los Angeles, Vancouver, Tijuana (Mexico), Pitcairn Islands (UK territory)

Mountain Time (MT) – Denver, Phoenix (no DST), Chihuahua (Mexico), Some Canadian provinces (parts of Alberta)

Central Time (CT) – Chicago, Mexico City, Guatemala, Costa Rica, Honduras, Galápagos Islands (Ecuador), Belize

Eastern Time (ET) – New York, Washington, Toronto, Columbia, Panama, Jamaica, Cuba, Haiti

Eastern Caribbean (e.g., Barbados, Grenada, Saint Lucia), Puerto Rico, U.S. Virgin Islands, Dominican Republic

Argentina, Uruguay, Brazil, Chili, Paraguay, Greenland (west coast)

South Georgia and the South Sandwich Islands (UK overseas territory)

Cape Verde, Some parts of Greenland

Central European Time (CET) – France, Germany, Italy, Spain, Nigeria, Poland, Cameroon, Algeria, Hungry, Niger, Sweden

Notes: Widely used across Europe and parts of West Africa. Switches to UTC+2 during summer in many European countries.

Eastern European Time (EET), South Africa Standard Time – Romania, Greece, Ukraine, South Africa, Israel (winter), Egypt, Finland (winter), Syria, Jordan

Notes: Used in Eastern Europe, Israel, and parts of northern Africa.

Arabian Standard Time, East Africa Time – Russia (western regions), Saudi Arabia, Iraq, Kenya, Ethiopia, Tanzania, Turkey, Qatar

Notes: Includes Middle East and much of East Africa.

United Arab Emirates, Oman, Georgia, Armenia, Russia (Samara region), Mauritius, Seychelles

Afghanistan

Unique Offset used only by Afghanistan.

Pakistan, Kazakhstan (west), Maldives, Turkmenistan, Uzbekistan

Bangladesh, Bhutan, Kazakhstan (central), Kyrgyzstan

Thailand, Vietnam, Cambodia, Indonesia (western), Russia (Krasnoyarsk)

China Standard Time, Australian Western Standard Time – China, Hong Kong, Macau, Singapore, Malaysia, Philippines, Australia (Western), Taiwan, Russia (Irkutsk)

Japan/Korea Standard Time – Japan, South Korea, Indonesia(eastern), Russia (Yakutsk), Timor-Leste

Australian Eastern Standard Time (AEST) – Australia (Sydney, Melbourne, Brisbane), Papua New Guinea, Russia (Vladivostok), Northern Mariana Islands, Guam

Solomon Islands, Vanuatu, Micronesia (Kosrae, Pohnpei), Russia (Magadan)

New Zealand Standard Time – New Zealand, Fiji, Kiribati (Gilbert Islands), Marshall Islands, Tuvalu, Tonga, Samoa (in winter)

Tonga, Samoa (in summer), Kiribati (Phoenix Islands)

Earliest time zone on Earth – Kiribati (Line Islands only — e.g., Kiritimati/Christmas Island)

Fun Fact: This is the first place on Earth to welcome any new day.