This post explains how to configure time-dependent URL rewriting rules by using IIS URL Rewrite 2.0. Time-dependent URL rewriting may be useful when you want to rewrite or redirect HTTP requests based on the time of day or when you need to take the entire
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Read the complete post at http://blogs.iis.net/ruslany/archive/2010/04/05/time-dependent-url-rewriting.aspx