title: AWS API Request has expired
body: <p>I am attempting to retrieve information about an Amazon Store item. I believe I have created a Javascript program that can produce properly formatted requests using my AWS credentials. However, Amazon responds to my requests with "Request has expired. Timestamp date is xxxx-xx-xxTxx:xx:xxZ."</p>
  
  <p>According to documentation, timestamps are valid for 15 minutes, and the UTC time I am submitting is definitely not 15 minutes off. </p>
  
  <p>Here is one of my example requests: 
  <a href="http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&amp;AWSAccessKeyId=[MY-ACCESS-KEY-ID]&amp;AssociateTag=[MY-ASSOCIATE-TAG]&amp;Operation=ItemLookup&amp;ItemId=B00008OE6I&amp;Timestamp=2017-06-12T17%3A15%3A41Z&amp;Signature=PdCAjiE%2Bl7tsQDY8SzqOWiiLPFI%3D" rel="nofollow noreferrer">http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&amp;AWSAccessKeyId=[MY-ACCESS-KEY-ID]&amp;AssociateTag=[MY-ASSOCIATE-TAG]&amp;Operation=ItemLookup&amp;ItemId=B00008OE6I&amp;Timestamp=2017-06-12T17%3A15%3A41Z&amp;Signature=PdCAjiE%2Bl7tsQDY8SzqOWiiLPFI%3D</a></p>
  
  <p>Anyone know what might be going on?</p>