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HomeHomeUsing DNN Platf...Using DNN Platf...Skins, Themes, ...Skins, Themes, ...CurrentDate - is what date?CurrentDate - is what date?
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4/6/2006 4:15 PM
 
Michael Flanakin


Michael Flanakin's Avatar

michaelflanakin.com
Joined: 4/5/2004
Posts: 994
I decided to take a look at this and the answer is actually quite complicated. First off, everything is tiered, starting at the server time as the lowest level. From what I can tell, the portal's time zone is assumed to be the same as the server (this is where we're having problems). This is then adjusted by the user's time zone. Here's the math...

timeZone = userTimeZone - portalTimeZone
displayTime = serverTime + timeZone

Assuming a CST server, UTC portal, and CST user at 12:00 CST...

timeZone = (-6) - (0) = -6
displayTime = (12:00) + (-6:00) = 6:00

I'm sure you see the problem. The server's time zone is not factored into the equation. Most people probably don't notice because they are only a few time zones off, if that. The people who are probably having the problem are those running portals with hosts and users across the globe. Like my example, for instance - a US-based host, England-based portal, and US users. This will end up using the user's time zone against them.

From what I can tell, the only way to fix this is to set the portal time zone to the same as the server (or vice-versa, obviously). Of course, this means your default time zone for new users will be off.

Note: This is logic based on my evaluation of what happened when I changed the three time zones. I didn't find this in code.
Michael Flanakin | Microsoft Consulting Services
www.michaelflanakin.com
 
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4/7/2006 8:51 AM
 
Antony Slater


www.webpc.net
Joined: 9/21/2004
Posts: 499
Thanks for your analysis.  Any core team member know whether this is the case with the code?  Sorry I tried to follow it but its out of my capabilities.
Thanks
Antony
 
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4/10/2006 11:55 PM
 
Antony Slater


www.webpc.net
Joined: 9/21/2004
Posts: 499
WEBPC wrote
Thanks for your analysis.  Any core team member know whether this is the case with the code?  Sorry I tried to follow it but its out of my capabilities.
Thanks
Antony


Bump anyone?
 
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4/11/2006 9:47 AM
 
Michael Flanakin


Michael Flanakin's Avatar

michaelflanakin.com
Joined: 4/5/2004
Posts: 994
I went ahead and dug thru the code... My assumptions were correct. This logic is maintained in the DotNetNuke.Entities.Users.UserTime class (components\Users\UserTime.cs). To fix it, change the following property...

Public ReadOnly Property CurrentUserTime() As DateTime
  Get
    Dim context As HttpContext = HttpContext.Current
    Dim objSettings As PortalSettings = PortalController.GetCurrentPortalSettings()
    If Not (context.Request.IsAuthenticated) Then
      Return DateTime.UtcNow.AddMinutes(objSettings.TimeZoneOffset)
    Else
      Return DateTime.UtcNow.AddMinutes(objSettings.TimeZoneOffset).AddMinutes(ClientToServerTimeZoneFactor)
    End If
  End Get
End Property

I believe this should fix the problem.
Michael Flanakin | Microsoft Consulting Services
www.michaelflanakin.com
 
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4/11/2006 10:07 AM
 
Michael Flanakin


Michael Flanakin's Avatar

michaelflanakin.com
Joined: 4/5/2004
Posts: 994
Michael Flanakin | Microsoft Consulting Services
www.michaelflanakin.com
 
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