![]() The tz database version 2023c contains two entries for Arizona: It was approved by Governor Jack Williams the same day. It passed the Senate 25–3–2, and afterwards the bill was passed by the House 49–1–10. : 629 The bill had been working its way through the legislature since January of that year, and was sponsored by state Senators Tenney, Goetze, Porter, Halacy, Garfield, Campbell, Lewis, Gregovich, Giss, Crowley, and Holsclaw. On March 21, 1968, the Arizona legislature passed the final version of SB 1, placing Arizona under standard time. It lies in northeastern Arizona, northwestern New Mexico, and southeastern Utah and thus maintains the same time throughout tribal lands despite state borders. The Navajo Nation, a semi-autonomous Native American territory, follows the United States DST schedule. The argument against extending the daylight hours into the evening is that people prefer to do their activities in the cooler morning temperatures. For this reason, driving the length of Arizona State Route 264 east from Tuba City while DST is in place involves six time zone changes in less than 100 miles (160 km).īecause of Arizona's hot climate, DST is largely considered unnecessary. The Hopi Reservation, which is not part of the Navajo Nation but is geographically surrounded by it, also does not observe DST. Unlike most of the United States, Arizona does not observe daylight saving time (DST), with the exception of the Navajo Nation, which does observe DST. Both time zones have the same time during winterĬonsole.Daylight saving time (DST) observance across Arizona. Var winterTimeWithDst = mstWithDstNodaTz.AtStrictly(localWinterDate) NodaTime ZonedDateTime for Arizona with daylight saving time: January 1, 2017, 15:00 Var winterTimeWithoutDst = mstWithoutDstNodaTz.AtStrictly(localWinterDate) NodaTime ZonedDateTime for Arizona without daylight saving time: January 1, 2017, 15:00 Var localWinterDate = new LocalDateTime(2017, 01, 01, 15, 00) Var mstWithDstNodaTz = BclDateTimeZone.FromTimeZoneInfo(mstWithDstTz) NodaTime BclDateTimeZone for Arizona with daylight saving time Var mstWithoutDstNodaTz = BclDateTimeZone.FromTimeZoneInfo(mstWithoutDstTz) NodaTime BclDateTimeZone for Arizona without daylight saving time Var mstWithDstTz = TimeZoneInfo.FindSystemTimeZoneById("Mountain Standard Time") Arizona with daylight saving time (TZ: America/Shiprock) Var mstWithoutDstTz = TimeZoneInfo.FindSystemTimeZoneById("US Mountain Standard Time") Arizona without daylight saving time (TZ: America/Phoenix) NET US Mountain Standard Time ( America/Phoenix, Arizona without DST) and Mountain Standard Time ( America/Shiprock, Arizona with DST). NET time zone ids.Ĭheck out NodaTime, it can help you a lot when it comes to dealing with date, time and time zones.Īnd finally, here is a sample program (with NodaTime) that demonstrates the difference between. So, you would have both ids in your database, US Mountain Standard Time and Mountain Standard Time, or alternatively some other strings that you would later map to these. ![]() In order to get Arizona time zone that does observe DST ( America/Shiprock), you can use: TimeZoneInfo.FindSystemTimeZoneById("Mountain Standard Time") In order to get Arizona time zone that does not observe DST ( America/Phoenix), you can use: TimeZoneInfo.FindSystemTimeZoneById("US Mountain Standard Time") ![]() However, if you try to get time zones with TimeZoneInfo.FindSystemTimeZoneById using tz database names, you will get System.TimeZoneNotFoundException. America/Phoenix (Mountain Standard Time - Arizona, except Navajo), which does not observe daylight saving changes (DST), andĭepending on your users' exact location in Arizona, you should use either America/Phoenix or America/Shiprock time zone, so you will need two values in the database.IANA (tz database) time zone database contains two time zones for Arizona: “Daylight” time zones, such as MDT, are mostly used for areas that Time is the same, Arizona uses standard time (MST) all year. States California and Nevada during the summer season. Minus 7 hours (UTC-7), Arizona has the same local time as neighboring Because MST and PDT have the same UTC offset of Time (PDT) during the summer and on Mountain Standard Time (MST)ĭuring the winter. There is a common misconception that Arizona is on Pacific Daylight ![]()
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