UTC is a time standard that is the basis for time and time zones worldwide.GMT is a time zone officially used in some European and African countries as their local time.However GMT is a time zone and UTC is a time standard. GMT (Greenwich Mean Time) is sometimes confused with UTC (Coordinated Universal Time). This moment in time is sometimes referred to as epoch time. UNIX time is the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), 1 January 1970. If your data does not have timestamps, the time at which your data is indexed is used as the timestamp for your events. Regardless of how time is specified in your events, timestamps are converted to UNIX time and stored in the _time field when your data is indexed. When the United States returns to Standard time, the -8 offset equates to the Pacific Standard Time (PST). San Francisco is in the Pacific timezone. The -0700 in the timestamp equates to the -7 in UTC-7.ĭuring Daylight Savings Time (DST) in the United States, the -7 offset equates to the Pacific Daylight Time (PDT). For example T11:45:30-07:00 could be expressed as UTC-7. Sometimes you might see a timestamp expressed as UTC-7 or UTC+3, which is UTC with the offset from GMT. The local time is interpreted as the same time zone as the Splunk indexer where the data is indexed. US Pacific Daylight Time, the timezone where Splunk Headquarters is located.Ī timestamp with an offset from GMT (Greenwich Mean Time)Ī timestamp expressed in UTC (Coordinated Universal Time) The timestamp might be in one of several formats, as shown in the following table: When data is indexed, the Splunk indexer looks for a timestamp in each event. The time change in the USA always takes place at 2 o'clock of the respective local time.The Splunk platform processes time zones when data is indexed and when data is searched. Unlike Europe, for example, the clock is turned on the same night, but not at the same time. Only Hawaii and most of Arizona remain on standard time all year. It always begins on the second Sunday in March and ends on the first Sunday in November. Today, daylight saving time is introduced on the same day throughout the country. However, it was not implemented until 1918 during the First World War. Daylight Saving Time in the USA Earlier than in most other countries, daylight saving time was introduced by Benjamin Franklin in 1784. Together with Wake Atoll (UTC+12), they are on the other side of the International Date Line. Guam and the Northern Mariana Islands are in Chamorro Time (UTC+10).American Samoa received its own time zone, which today also includes the atolls Midway and Palmyra, as well as Kingman Reef. ![]() Puerto Rico and the American Virgin Islands with Atlantic Time.Outside these areas, there are other territories of the USA with their own time zones as well: Later, Alaska and Hawaii also got their own time zones. In northern Arizona, there are even areas that don't even switch to daylight saving time. As many as 14 of the 50 states have two time zones. ![]() Pacific Standard Time It is worth noting that the time zones are not always aligned with state boundaries.Thus, to this day, the Ministry of Transport is responsible for the allocation of time zones and the timing of time changes.įour standard times were initially introduced in the contiguous continental United States: This was a real challenge, especially for transportation and railroads. And not even that could be reliably measured with the methods of the time. ![]() Each place set its own time based on the position of the sun. Since November 1883, there have been uniform time zones in the United States - before that, there was a jumble of over 300 different times and even more zones, which already varied from city to city.
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