The table "Time of day by zone" gives an overview on the time relations between different zones. Cities in Central Standard Time Zone include Houston, Lubbock, San Antonio, Abilene, Odessa and Amarillo. in which each side of the equation is equivalent to UTC. UTC time is also known as "Zulu" time, since "Zulu" is a Time zones are often represented by alphabetic abbreviations such as "EST", "WST", and "CST", but these are not part of the international time and date standard These examples give the local time at various locations around the world when daylight saving time is not in effect: The time-zone adjustment for a specific location may vary because of daylight saving time. Daylight Saving Time, for the U.S. and its territories, is NOT observed in Hawaii, American Samoa, Guam, Puerto Rico, the Virgin Islands and the state of Arizona (not the Navajo Indian Reservation, which does observe DST). Time reverts to standard time at 2 a.m. on the first Sunday of November. It took many decades before all time zones were based on some "standard offset" from GMT/UTC.

A time zone is a region of the globe that observes a uniform standard time for legal, commercial and social purposes. The problem of differing local times could be solved across larger areas by synchronizing clocks worldwide, but in many places that adopted time would then differ markedly from the solar time to which people were accustomed. Today, all nations use standard time zones for secular purposes, but they do not all apply the concept as originally conceived. UTC used to be called GMT (Greenwich Mean Time), after the Royal Observatory located in the Greenwich area of London.. UTC is also sometimes called Z or Zulu time.

This is a list of the time offsets by U.S. states, federal district, and territories.For more about the time zones of the U.S. see time in the United States.. For a list of time zones by country, see Region on Earth that has a uniform standard time for legal, commercial, and social purposesSpain may have chosen its time zone for other reasons, such as synchronising with trading partners, and adopting CET as a major member of the EUGianluigi Parmeggiani (Osservatorio Astronomico di Bologna), Daylight Saving Time begins for most of the United States at 2 a.m. on the second Sunday of March. Still the time table for port calls must follow the land time zone.

Explore Austin's sunrise and sunset, moonrise and moonset. For example, the international English-language version of CNN includes GMT and Hong Kong Time,While most application software will use the underlying operating system for time zone information, As an alternative to the time zone information bundled with the Java Platform, programmers may choose to use the Joda-Time library.As of Java 8 there is a new date and time API that can help with converting time zones.

Most states are entirely contained within one time zone. Time zone difference or offset between the local current time in United Kingdom – England – London and USA – Texas – Houston. On November 2, 1868, the then British colony of New Zealand officially adopted a standard time to be observed throughout the colony, and was the first country to do so.Timekeeping on the American railroads in the mid-19th century was somewhat confused. Hill, John C., Thomas F. Utegaard, Gerard Riordan. Navajo Nation participates in the Daylight Saving Time policy, due to its large size and location in three states.Official Reference: UNITED STATES CODE, TITLE 15 - COMMERCE AND TRADE, CHAPTER 6 - WEIGHTS AND MEASURES AND STANDARD TIME, SUBCHAPTER IX - The continental United States (the 48 contiguous states) is divided into 4 time zones.

Each railroad used its own standard time, usually based on the local time of its headquarters or most important terminus, and the railroad's train schedules were published using its own time. 21:45Z with the Z indicating UTC. The captain is permitted to change the ship's clocks at a time of the captain's choice following the ship's entry into another time zone.