Note that some of the abbreviations are not unique. Index of Time Zone Acronyms and AbbreviationsĪlphabetically sorted. There are 25 time zones defined here, but 26 letters in the English Alphabet. Note that 'J' is skipped ('J' - Juliet refers to the current local time of the observer). Other letters/words are used for other time zones than UTC, most based on the right or reverse order of the Alphabet. It is sometimes used in the US Military and NATO in conjunction with 24-hour clocks and popular use in movies to reference time. It's a convention to assign letters to time zones, where Z= Zero meridian and Zulu is the word that represents the letter Z when it's used in communication. The basis for this is Z - Zulu time - Zero meridian time - the same as UTC. The following table lists the Military time zone abbreviations. IST is described as "summertime", according to Irish law, while Irish Standard Time is described as both "standard time" and "winter time". The term "IST" is not the legal abbreviation to describe Irish Summer Time but it is commonly used. The following table lists the European time zone abbreviations. The following table lists the Australian time zone abbreviations. The following table lists the North American time zone abbreviations. Understanding Time ZonesĬlick here for interactive Daylight maps. Map of World Time ZonesĬlick here for interactive time zone maps and actual time calculator: Timezone maps. Time Zone Map of the WorldĬlick to view a bigger, printable size of the timezone map. About half of the world's nations use daylight saving. To follow the system, timepieces are advanced by an hour on a pre-decided date in spring and reverted in the fall. Daylight Saving Timeĭaylight saving is a summertime adjustment to the local time in a country or region, designed to cause a higher proportion of citizens' waking hours to pass during daylight. Those traveling in the opposite direction, from east to west, must add a day. When moving from west to east across the dateline, travelers have to set their watches back one day. The dateline is needed because of the use of local times worldwide rather than a single universal time. It is an arbitrary marker between calendar days. The International Dateline is an imaginary line from pole to a pole that roughly corresponds to the 180° longitudinal meridian. However, UTC is based on an atomic clock, whereas GMT is determined by the Sun's position in the sky relative to the 0° longitudinal meridian, which runs through Greenwich, UK. UTC is a successor to, and closely approximates, Greenwich Mean Time (GMT). For example, Australian Western Standard Time (the local time in Western Australia) is set 8 hours ahead of UTC (it is UTC+8), whereas Eastern Standard Time in the United States is set 5 hours behind UTC (it is UTC-5). Coordinated Universal Time (UTC)Ĭoordinated Universal Time (UTC) is a reference by which the local time in each time zone is set. China is unusual in that just one standard time is used for the whole country, even though it extends across 60° of longitude from west to east. For example, the coterminous United States straddles four time zones and has four standard times: Eastern, Central, Mountain, and Pacific standard times. Most countries have just one time zone and one standard time, but some large countries (such as the US, Canada, and Russia) are split between several time zones, so the standard time varies across those countries. Still, they are determined by geographical factors or borders between countries or parts of countries. Although time zones are arranged roughly in longitudinal bands, in many places, the borders of a zone do not fall exactly on longitudinal meridians, as can be seen on the map (above). It is defined by the time zone or zones associated with that country or region. Standard time is the official local time in a particular country or part of a country. There are 24 one-hour time zones around the world, arranged roughly in longitudinal bands. A region of Earth's surface within which a single local time is used is called a time zone. Because of these disparities, each country or part of a country adheres to a local time. Thus, it is simultaneously morning, evening, and nighttime in different parts of the world. Because Earth is a rotating sphere, the Sun shines on only half of its surface at any one time.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |