Most parts of the world observe daylight saving time during the summer. This is done because winter has shorter daylight time. It ends on the first week of November each year when time is again moved back by one hour. It starts on the second Sunday of March each year. Time is moved one hour ahead of the usual time during summer to make use of the longer days of summer and help save energy in the process. In the summer, the Pacific Daylight Time (PDT) is used. The Mexican state of Baja, California also uses PST in winter. It is also being used in the Canadian province of British Columbia except Cranbrook, Golden, and Invermere. The National Institute of Standards and Technology - Time and Frequency Division maintains the standard for frequency and time interval for the United States, provides official time to the United States, and carries out a broad program of research and service activities in time and frequency metrology. In the United States of America, it is used during winter in California, Idaho, Nevada, Oregon, and Washington. Pacific Standard Time (PST) is eight hours behind the Coordinated Universal Time (UTC-8). It is called the Pacific Standard Time (PST) in winter and the Pacific Daylight Time (PDT) in summer. It is based on the 120th meridian west of the Greenwich Observatory. The United States of America and Canada uses the Pacific Time Zone or PT. Daylight Saving Time used for Pacific Standard Time (PST), for details check here. Some of the time zones are: European Central Time (ECT), Eastern African time (EAT), Australia Central Time (ACT), Mountain Standard Time (MST), Central Standard Time (CST), Coordinated Universal Time (UTC), and Pacific Standard Time (PST). They are measured 15 degrees of the prime meridian at the Greenwich Observatory in Greenwich, England. There are more than 25 world time zones which range from -12 GMT to 0 GMT and +12 GMT. After a few hours, this is reversed and the cycle goes on all year.īecause of this, each part of the world has its own standard time zone. Since the world goes around the sun, parts of it experience daylight at one time while the other parts experience nighttime.
It rotates around the sun which provides it with light during the day and reflects light from the moon during the night. If the conversion of dateTime results in a date and time value that is earlier than DateTime.MinValue or later than DateTime.MaxValue, this method returns DateTime.MinValue or DateTime.MaxValue, respectively.The world is elliptical and, as such, different places experience a different climate, weather, natural phenomena, and time. DateTime.Kind propertyĭateTimeKind.Unspecified or DateTimeKind.UtcĬonverts from Coordinated Universal Time (UTC). The precise behavior of this method depends on the value of the Kind property of the dateTime parameter, as the following table shows. When performing the conversion, the ConvertTimeFromUtc method applies any adjustment rules in effect in the destinationTimeZone time zone. IIf(cstZone.IsDaylightSavingTime(cstTime), _ĬstZone.DaylightName, cstZone.StandardName))Ĭonsole.WriteLine("The registry does not define the Central Standard Time zone.")Ĭonsole.WriteLine("Registry data on the Central Standard Time zone has been corrupted.") TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time") ĭateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, cstZone) Ĭonsole.WriteLine("The date and time are. The following example converts Coordinated Universal Time (UTC) to Central Time.
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