I read the recent Linns story about how first day covers are all going to be canceled at the Cancellation Services unit of the USPS in Kansas City, Mo. (see below). So modern first day covers are no longer actually canceled on the day of the postmark, nor are they actually canceled, possibly never actually being in the city on the postmark. It seems to me that they no longer have any trace to what they were designed to to be.
http://www.linns.com/news/us-stamps...utm_content=