Deploying an ASP.NET application on a different timezone

Yesteday I had a very strange behavior. I had to build an installer package to update a web application in a customer site, but got crazy trying to have it installed correctly.

The application installed fine, but as soon as I tried to browse it, a strange error appeared on the EventViewer:

Type : System.ArgumentOutOfRangeException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089        Message : Specified argument was out of the range of valid values. Parameter name: utcDate        Source : System.Web        Help link :        ActualValue :        ParamName : utcDate        Data : System.Collections.ListDictionaryInternal        TargetSite : Void UtcSetLastModified(System.DateTime)        Stack Trace :    at System.Web.HttpCachePolicy.UtcSetLastModified(DateTime utcDate)           at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler.ProcessRequest(HttpContext context)           at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()           at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

What was happening?

Well, it appears that there is a problem with assemblies compiled in the “future”. Obviously this means that if you’re deploying an application on another timezone you must the coherency of the date/time of your assemblies with the actual date/time of that server.

In fact, IIS looks for the date/time of your assemblies, and if the date/time of your assemblies is on the future compared with the local date/time then it crashes with the exception above.

Hope this helps someone else having this issue.