Time Zone Conversion in vb.net

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VB

MySQL

I'm thinking of building an application that can send you info over email about your day. The server will check the time that email should be sent and then send it. This method works great if there was only one time zone however different countries have different time zones. I'm currently using (UTC) Dublin, Edinburgh, Lisbon, London. My question is, is there a way to convert TimeZones in vb.net?

I tried something like this:

Dim ZoneId As String = "Central America"
Dim localtime As DateTime = DateTime.Now
Dim timeZoneInfo As TimeZoneInfo = System.TimeZoneInfo.FindSystemTimeZoneById(ZoneId)
Dim dataTimeByZoneId As DateTime = System.TimeZoneInfo.ConvertTime(localtime, System.TimeZoneInfo.Local, timeZoneInfo)
Return dataTimeByZoneId

But nothing seems to be working.

Thanks in advance!