Consider I have 2 times which are for different countires:
考虑我有两次针对不同的countires：
"2013/02/11 13:20:44" (Tehran possibly UTC+3:30 or UTC+2:30 due to day light saving)
"2013/02/11 15:20:44" (Abu Dhabi possibly UTC+4:00 or UTC+3:00 due to day light saving)
Question1: How can I accurately convert these times to Utc?
问题1：如何准确地将这些时间转换为Utc？
I want to mention that the day light saving is not a fixed information and may vary time to time and country to country.
我想提一下，节省日照不是一个固定的信息，可能会随着时间和国家而变化。
For example in 2010 Iran had not day light savings for some political reasons.
例如，2010年，由于某些政治原因，伊朗没有节省日光。
Question2: Is there some trust-able place or web service with this information?
问题2：这些信息是否有一些可信赖的地方或网络服务？
2 个解决方案
#1
3
For .net application Time Zone information updates with Windows updates, so if you server always have latest updates, you won't have problems with time zones.
对于.net应用程序时区信息更新与Windows更新，因此如果您的服务器始终有最新的更新，您将不会遇到时区问题。
And if you need to convert time, you can use TimeZoneInfo class:
如果您需要转换时间，可以使用TimeZoneInfo类：
TimeZoneInfo.ConvertTime(new DateTime(2005, 6, 1), TimeZoneInfo.FindSystemTimeZoneById("Iran Standard Time"), TimeZoneInfo.Utc)
And if you need to, you can get AdjestmentRules for time zones:
如果需要，您可以获得时区的AdjestmentRules：
TimeZoneInfo.FindSystemTimeZoneById("Iran Standard Time").GetAdjustmentRules();
#2
0
You could try using Noda Time
您可以尝试使用Noda Time
More detailed information can be found in this thread
更多详细信息可以在这个主题中找到
#1
3
For .net application Time Zone information updates with Windows updates, so if you server always have latest updates, you won't have problems with time zones.
对于.net应用程序时区信息更新与Windows更新，因此如果您的服务器始终有最新的更新，您将不会遇到时区问题。
And if you need to convert time, you can use TimeZoneInfo class:
如果您需要转换时间，可以使用TimeZoneInfo类：
TimeZoneInfo.ConvertTime(new DateTime(2005, 6, 1), TimeZoneInfo.FindSystemTimeZoneById("Iran Standard Time"), TimeZoneInfo.Utc)
And if you need to, you can get AdjestmentRules for time zones:
如果需要，您可以获得时区的AdjestmentRules：
TimeZoneInfo.FindSystemTimeZoneById("Iran Standard Time").GetAdjustmentRules();
#2
0
You could try using Noda Time
您可以尝试使用Noda Time
More detailed information can be found in this thread
更多详细信息可以在这个主题中找到