Hawaii–Aleutian Time Zone Hawaii–Aleutian Time Zone The Hawaii–Aleutian Time Zone observes Hawaii–Aleutian Standard Time (HST), by subtracting ten hours from Coordinated Universal Time (). The clock time in this zone is based on the mean solar time of the 150th meridian west of the Greenwich Observatory. The zone takes its name from the two areas it includes: Hawaii and the portion of Alaska's Aleutian Islands west of 169° 30′ W longitude. During daylight saving time, the Alaskan portion observes Hawaii–Aleutian Daylight Time (HDT, ), while Hawaii stays on standard time. From 1900 until 1947, GMT−10:30 was used as standard time in Hawaii. French
Standard Swedish there is no one standard for spoken Swedish. There are several regional varieties (acrolects or prestige dialects) that are used in official contexts. The major regional variants include those of South Sweden (based on South Swedish dialects), Western Sweden (centered on Gothenburg), Central Sweden (centered on the capital of Stockholm) and Northern Sweden (based on Norrland dialects). There is also a separate standard for Swedish in Finland based on Finland Swedish. In national broadcast media Sweden, several of these occur, though the Central Swedish variant dominates and is often perceived as more "standardized" and more neutral than the others. Swedish