atlas JavaScriptObjectSerializer serializing DateTime properties to wrong time zone

[sonic]

when i serialize my c# object to javascript, it creates a
Date(1153958400000); in place where my c# DateTime property was, and
that date goes back 4 hours to eastern standard time. than the browser
does another -4


MyUser u = GetUser();
string s =
Microsoft.Web.Script.Serialization.JavaScriptObjectSerializer.Serialize(
u );