me)</pre>
<div class="block">Returns the value of the specified request header as a <code>long</code> value that represents a <code>Date</code>
 object. Use this method with headers that contain dates, such as <code>If-Modified-Since</code>.

 <p>
 The date is returned as the number of milliseconds since January 1, 1970 GMT. The header name is case insensitive.

 <p>
 If the request did not have a header of the specified name, this method returns -1. If the header can't be converted
 to a date, the method t