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Hawaii–Aleutian Time Zone
The Hawaii–Aleutian Time Zone observes Hawaii–Aleutian Standard Time (HST) by subtracting ten hours from Coordinated Universal Time ( UTC−10:00). 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 (DST), the Alaskan portion observes Hawaii–Aleutian Daylight Time (HDT, UTC−09:00), while Hawaii stays on standard time. Hawaii has not observed daylight saving time since September 1945. From 1900 until 1947, UTC−10:30 was used as standard time in Hawaii. French Polynesia uses UTC−10:00 for its major cities. The Cook Islands also use the same time. These areas do not use DST. "Hawaii–Aleutian Time Zone" is a U.S. term and for that reason the Polynesian areas are not considered to be a part of the Hawaii–Aleutian Time Zone. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coordinated Universal Time
Coordinated Universal Time or UTC is the primary time standard by which the world regulates clocks and time. It is within about one second of mean solar time (such as UT1) at 0° longitude (at the IERS Reference Meridian as the currently used prime meridian) and is not adjusted for daylight saving time. It is effectively a successor to Greenwich Mean Time (GMT). The coordination of time and frequency transmissions around the world began on 1 January 1960. UTC was first officially adopted as CCIR Recommendation 374, ''Standard-Frequency and Time-Signal Emissions'', in 1963, but the official abbreviation of UTC and the official English name of Coordinated Universal Time (along with the French equivalent) were not adopted until 1967. The system has been adjusted several times, including a brief period during which the time-coordination radio signals broadcast both UTC and "Stepped Atomic Time (SAT)" before a new UTC was adopted in 1970 and implemented in 1972. This change also a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hilo, Hawaii
Hilo () is a census-designated place (CDP) and the largest settlement in Hawaii County, Hawaii, United States, which encompasses the Island of Hawaii. The population was 44,186 according to the 2020 census. It is the fourth-largest settlement in the state of Hawaii and largest settlement in the state outside of Oahu. Hilo is the county seat of the County of Hawaii and is in the District of South Hilo. The city overlooks Hilo Bay and has views of two shield volcanoes, Mauna Loa, an active volcano, and Mauna Kea, a dormant volcano. Mauna Kea is the site of some of the world's most important ground-based astronomical observatories. The Hilo bay-front has been destroyed by tsunamis twice. The majority of human settlement in Hilo stretches from Hilo Bay to Waiākea-Uka, on the flanks of the volcanoes. Hilo is home to the University of Hawaii at Hilo, ʻImiloa Astronomy Center, as well as the Merrie Monarch Festival, a week-long celebration, including three nights of competition, of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Effects Of Time Zones On North American Broadcasting
The scheduling of television programming in North America (namely the United States, Canada, and Mexico) must cope with different time zones. The United States (excluding territories) has six time zones ( Hawaii–Aleutian, Alaska, Pacific, Mountain, Central and Eastern), with further variation in the observance of daylight saving time. Canada also has six time zones (Pacific, Mountain, Central, Eastern, Atlantic and Newfoundland). Mexico has four time zones (Pacific, Mountain, Central, and Eastern). This requires broadcast and pay television networks in each country to shift programs in time to show them in different regions. In Canada Broadcast networks Canadian broadcasting networks, with six time zones and a much larger percentage of its audience residing in the Mountain Time Zone than in the Central Time Zone, are sometimes able to avoid the issues that affect American programming by airing pre-recorded programs on local time. CBC Television and CTV created delay centr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Offset
The UTC offset is the difference in hours and minutes between Coordinated Universal Time (UTC) and local solar time, at a particular place. This difference is expressed with respect to UTC and is generally shown in the format , , or . So if the time being described is two hours ahead of UTC (such as in Kigali, Rwanda pprox. 30° E, the UTC offset would be "+02:00", "+0200", or simply "+02". By convention, every inhabited place in the world has a UTC offset that is a multiple of 15 minutes but the majority of offsets are stated in whole hours. There are many cases where the national standard time uses a time zone that differs from the UTC offset appropriate to its longitude. Time zones and time offsets A ''time zone'' is a geographical region in which residents observe the same standard time. Although nominally a new time zone is established every 15 degrees east or west of the prime meridian (meaning a one hour change in solar time), in practice local geographical or political c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Zone
A time zone is an area which observes a uniform standard time for legal, Commerce, commercial and social purposes. Time zones tend to follow the boundaries between Country, countries and their Administrative division, subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time. All time zones are defined as offsets from Coordinated Universal Time (UTC), ranging from UTC−12:00 to UTC+14:00. The UTC offset, offsets are usually a whole number of hours, but a few zones are offset by an additional 30 or 45 minutes, such as in Indian Standard Time, India, Time in Australia, South Australia and Nepal Time, Nepal. Some areas of higher latitude use daylight saving time for about half of the year, typically by adding one hour to local time during spring (season), spring and summer. List of UTC offsets In the table below, the locations that use daylight saving time (DST) are listed in their UTC offse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnston Atoll
Johnston Atoll is an Unincorporated territories of the United States, unincorporated territory of the United States, currently administered by the United States Fish and Wildlife Service (USFWS). Johnston Atoll is a National Wildlife Refuge and part of the Pacific Remote Islands Marine National Monument. It is closed to public entry, and limited access for management needs is only granted by Letter of Authorization from the United States Air Force and a Special Use Permit from the U.S. Fish and Wildlife Service. For nearly 70 years, the isolated atoll was under the control of the United States Armed Forces, U.S. military. During that time, it was variously used as a naval refueling depot, an Johnston Island Air Force Base, airbase, a testing site for nuclear and biological weapons, a secret missile base, and a site for the storage and disposal of chemical weapons and Agent Orange. Those activities left the area environmentally contaminated, and monitoring continues. The island i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adak Island, Alaska
Adak Island ( ale, Adaax, russian: Адак) or Father Island is an island near the western extent of the Andreanof Islands group of the Aleutian Islands in Alaska. Alaska's southernmost town, Adak, is located on the island. The island has a land area of , measuring long and wide, making it the 25th largest island in the United States. Due to harsh winds, frequent cloud cover, and cold temperatures, vegetation is mostly tundra (grasses, mosses, berries, low-lying flowering plants) at lower elevations. The highest point is Mount Moffett, near the northwest end of the island, at an elevation of 3,924 feet (1,196 m). It is snow covered the greater part of the year. Adak is its largest and principal city. The word ''Adak'' is from the Aleut word ''adaq'', which means "father". History Adak Island has been the home to Aleut peoples since antiquity. Russian explorers in the 18th century also visited the island but made no permanent settlements. During World War II, the Imperial J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kapaa, Hawaii
Kapaa (Kauai dialect: Tapaa) is an unincorporated community and census-designated place (CDP) in Kauai County, Hawaii, United States. It is the most populous town in the island of Kauai, with a population of 11,652 as of the 2020 census, up from 9,471 at the 2000 census. ''Kapaa'' is a Hawaiian adjective meaning "solid". Geography Kapaa is on the east side of Kauai at (22.088281, -159.337706). It is bordered to the south by the communities of Wailua and Wailua Homesteads and to the east by the Pacific Ocean. Hawaii Route 56 passes through the eastern part of the community, leading north to Anahola and south to Lihue. According to the United States Census Bureau, the Kapaa CDP has an area of , of which is land and (3.27%) is water. Demographics As of the census of 2000, there were 9,471 people, 3,129 households, and 2,281 families residing in the CDP. The population density was . There were 3,632 housing units at an average density of . The racial makeup of the CDP w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kailua-Kona, Hawaii
Kailua-Kona is an unincorporated community and census-designated place (CDP) in Hawaii County, Hawaii, Hawaii County, Hawaii, United States. It is also known as Kailua (a name it shares with Kailua, Honolulu County, Hawaii, a community located on the windward side of Oahu, Oahu), as Kona (a name it shares with Kona District, Hawaii, the district to which it belongs) and as Kona Town. Kailua-Kona is the second-largest settlement on the Hawaii (island), island of Hawaii (after Hilo) and the largest settlement on the west side of the island, where it is the center of commerce and the tourist industry. Kailua-Kona is served by Kona International Airport, located just to the north in the adjacent CDP of Kalaoa, Hawaii, Kalaoa. The population was 19,713 at the 2020 United States Census, 2020 census, up from 11,975 at the 2010 United States Census, 2010 census. Kailua-Kona was the closest major settlement to the epicenter of the 2006 Kiholo Bay earthquake. Kailua-Kona's boundaries were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kahului, Hawaii
Kahului () is a census-designated place (CDP) in Maui County in the U.S. state of Hawaii. It hosts the county's main airport (Kahului Airport), deep-draft harbor, light industrial areas, and commercial shopping centers. The population was 26,337 at the 2010 census. Kahului is part of the Kahului-Wailuku-Lahaina Metropolitan Statistical Area which includes nearby Wailuku and the town and former whaling village of Lahaina. The retail center for Maui County residents, Kahului has several malls and major stores (including department stores in the Queen Kaahumanu Center); other significant groupings of stores are in Lahaina such as the Lahaina Cannery Mall, the Happy Valley area of Wailuku, Maui Market Place and Maui Mall, which are both also located in Kahului; and The Shops at Wailea in Wailea. Kahului is not generally considered a tourist destination. It does feature the Alexander & Baldwin Sugar Museum, Kanaha Pond State Wildlife Sanctuary, Kanaha Beach County Park, and the M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honolulu, Hawaii
Honolulu (; ) is the capital and largest city of the U.S. state of Hawaii, which is in the Pacific Ocean. It is an unincorporated county seat of the consolidated City and County of Honolulu, situated along the southeast coast of the island of Oahu, and is the westernmost and southernmost major U.S. city. Honolulu is Hawaii's main gateway to the world. It is also a major hub for business, finance, hospitality, and military defense in both the state and Oceania. The city is characterized by a mix of various Asian, Western, and Pacific cultures, reflected in its diverse demography, cuisine, and traditions. ''Honolulu'' means "sheltered harbor" or "calm port" in Hawaiian; its old name, ''Kou'', roughly encompasses the area from Nuuanu Avenue to Alakea Street and from Hotel Street to Queen Street, which is the heart of the present downtown district. The city's desirability as a port accounts for its historical growth and importance in the Hawaiian archipelago and the broader Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mean Solar Time
Solar time is a calculation of the passage of time based on the position of the Sun in the sky. The fundamental unit of solar time is the day, based on the synodic rotation period. Two types of solar time are apparent solar time (sundial time) and mean solar time (clock time). Introduction A tall pole vertically fixed in the ground casts a shadow on any sunny day. At one moment during the day, the shadow will point exactly north or south (or disappear when and if the Sun moves directly overhead). That instant is local apparent noon, or 12:00 local apparent time. About 24 hours later the shadow will again point north–south, the Sun seeming to have covered a 360-degree arc around Earth's axis. When the Sun has covered exactly 15 degrees (1/24 of a circle, both angles being measured in a plane perpendicular to Earth's axis), local apparent time is 13:00 exactly; after 15 more degrees it will be 14:00 exactly. The problem is that in September the Sun takes less time (as me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
