SimpleDateFormat localFormater = new SimpleDateFormat("hh:mm aaa")
#Arizona time zone name how to
#Arizona time zone name code
When I ran this code just now, the output was: It’s simple when you know how: ZonedDateTime arizonaExceptNavajo = ZonedDateTime.now(ZoneId.of("America/Phoenix")) They are all poorly designed and fortunately all long outdated. Don’t use the classes Calendar, GregorianCalendar, TimeZone and Date. A timezone named "US/Indiana" (or "America/Indianapolis") was created to cover this region, an even today, you would still want to use the timezone "America/Indianapolis" when talking about Indiana, so that queries about dates and times before 2006 could be answered correctly. While you usually think of the term "time zone" to mean the time of day in the middle of the winter (when everybody observes standard time), in the Olson database a timezone name represents the entire history of daylight savings time rules and timezone rules for a particular region.Īs an example, even though Indiana now observes Eastern time and observes DST (except for a few counties right near Chicago which are on Central time like Chicago), before 2006 they didn't observe DST. To get the correct time in the correct timezone for any given city in the world, you simply have to familiarize yourself with the names in the Olson timezone database and their meanings. To save yourself some of the trouble, always try to use the names from "America/*" where you can pick the name of a city that has the same timezone rules as the place you're interested in. In the Navajo nation, you want the timezone named "Navajo". To get the rules for Arizona (which don't include DST), you want the timezone "US/Arizona" (or "America/Phoenix"). If you specify the timezone "US/Mountain", then the computer will apply the rules used by most states in the Mountain time zone, which include observing daylight savings time.
#Arizona time zone name full
You can download the full list of timezones from or visit the zoneinfo website.Arizona is in the Mountain timezone, but doesn't observe DST. The list above is by no means comprehensive. Phoenix: Arizona Time (Mountain Time with no DST).Here are some common timezones used in the United States: Since there are no duplicate city names between continents, the city name also works as a canonical identifier.Īll timezones in Haystack are represented using the city name of an entry in the zoneinfo database. For example, US Eastern time is canonically identified as "America/New_York". The zoneinfo database uses a convention of naming timezones as "Continent/City". Haystack uses the zoneinfo database, which is also used by Unix and many programming languages.
Luckily, there is a database that keeps track of these rules across regions and time. This means that computing a date in 2000 uses different rules than 2010 (we call these historical timezones). For example, in 2007 the US changed the dates for when DST starts and ends. This means that a given region might change its timezone rules (either UTC offset of DST rules) over time. Timezones are quite problematic for computers because they are a political abstraction versus a scientific abstraction. But between 2am on the second Sunday of March and 2am on the first Sunday in November is daylight savings time (DST) and is -4hrs from UTC.īecause timezones are such a critical aspect of time-series data, Haystack requires a comprehensive model and database of timezones. For example, US Eastern Standard Time is -5hrs from UTC. In Haystack, we use the term timezone to encapsulate two concepts: offset from UTC and daylight saving time rules. Timezones are identified using the tz tag with a city name from the zoneinfo database (discussed below). This makes it critical to define a proper, unambiguous representation of time and timezones. Time-series data is the foundation for sensor and operational data.
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