Fuseau Horaire HADT — Signification, Décalage UTC.

HADT is a US Pacific or Mountain band offset, so it is read more from western North America than from anywhere else. In practice it is read inside North America, where the leading city anchors are reference-only timezone clusters.

HADT is unusually unambiguous: it ties to a single country and a single IANA zone, which is closer to a national clock label than a multi-region abbreviation.

HADT shows up on broadcast guides, sports schedules, and inter-state corporate calendars. HADT can also flip to a sibling daylight-saving abbreviation later in the year, so timestamps before and after the change need to be read carefully.

United States sits in Americas, specifically North America. Population 340,110,988, area 9,525,067 km², capital Washington, D.C.. Civic markers behind HADT include English and USD (United States dollar, $).

United States backdrop: The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 341 million.

HADT in the Hawaii-Aleutian Time meaning runs 9h behind UTC through North America, threading zones such as America/Adak (cities: reference cities). Country anchors: United States.

United States runs on a single zone (0 mapped cities) under HADT. Visible cities: the lead reference city. Underlying zones: America/Adak.