When a new stamp is issued, a ceremony is held, that is typically in a location of special relevance to the subject on the stamp.
A variety of ephemera are for sale at the ceremony – canceled stamps on envelopes (first day covers), a program which has some information on the subject of the stamp, as well as the cancelled stamp, or a one sheet information page that also has a cancelled stamp.
Jacqueline Cochran Stamp First Day of Issue (March 9, 1996) Information Sheet
