DateTime.KindĪssumes the dateTime parameter is local time and converts local time to UTC. The exact conversion performed by the method depends on the value of the dateTime parameter's Kind property, as the following table shows. The easiest way to convert a time to UTC is to call the static ( Shared in Visual Basic) TimeZoneInfo.ConvertTimeToUtc(DateTime) method. Because DateTimeOffset objects store a date and time value along with its offset from UTC, they always represent a particular point in time in relationship to UTC. You can also serialize a DateTimeOffset structure to unambiguously represent a single point in time. NET Framework.) Converting individual time zones to UTC makes time comparisons easy. (For details and other best practices using dates and times, see Coding best practices using DateTime in the. The use of UTC time is recommended when a date and time's portability across computers is important. Thus, UTC provides a kind of time-zone free or time-zone neutral time. The world's time zones are expressed as positive or negative offsets from UTC. Converting to Coordinated Universal TimeĬoordinated Universal Time (UTC) is a high-precision, atomic time standard.
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This topic explains how to convert times from one time zone to another, as well as how to convert DateTimeOffset values that have limited time zone awareness.
For example, a Web page that displays the current time in the eastern part of the United States will lack credibility to a customer in eastern Asia. An application can no longer assume that all times can be expressed in the local time, which is the time available from the DateTime structure. It is becoming increasingly important for any application that works with dates and times to handle differences between time zones.
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