title: Amazon Product Advertising API, timestamp issue
body: <p>Integrated Amazon Product Advisement API with my own application, It's working fine but the problem is:</p>
  
  <p>To access the API we need time stamp, when I put the code on the server ( which is in other country), and used the server time stamp, then API gave the following error in the XML: "Request has expired. Timestamp date is XXXX-XX-XXTXX:XX:XXZ",</p>
  
  <p>but when I enter my own time zone where currently I am, then its start working fine. Why API is working fine with client side timestamp, on the other hand all calculation related to API are happening on the server side.</p>
  
  <p>I consult the following Developer document of Amazon API, but no avial.
  <a href="http://awsdocs.s3.amazonaws.com/Associates/latest/prod-adv-api-dg.pdf" rel="nofollow">Product Advertising API Developer GuideAPI Version 2011-08-01</a></p>