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Figuring out website user's timezone based on UTC offset

Posted on 2012-03-23
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Last Modified: 2012-03-23
I am using ipinfodb.com to detect a website visitor's IP address and figure out their city and timezone. For instance, I can detect city = "ATLANTA" and timezone = "-05:00"

How to I figure out the exact date/time where they are -- I understand I can get UTC time by doing DateTime.UtcNow -- but how do I apply the "-05:00" to UTC to adjust the resulting date/time?

I've done Google searches but all I have come up with is using TimeZoneInfo.FindSystemTimeZoneById -- but this requires a string value of a location, which I don't have. I have the numerical offset hours instead.
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Question by:mandi224
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Bob Learned earned 2000 total points
ID: 37758174
Do you mean something like this?

    DateTime.UtcNow.AddHours(-5)
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