The First Day Covers (FDC)
The first day covers (envelopes or cards), (F.D.C.) is a philatlic commemorative document, it is composed of an envelope or a card, stamp, and of a cancellation comprising the date of emission (first day issue of the stamp). The illustration is not obligatory, but adds to the beauty of the object. It appeared officially in 1936 with the anticipated sale of the stamp "Rouget de l'Isle". Consequently, several editors of FDC appeared, and disappeared (for some)! The anticipated sale, in temporary post offices, stamps with obliteration 1st Day became general for all the stamps since the years 1950.
FDC : Trigramme anglais signifiant : First Day Cover (enveloppe premier jour).
Les éditeurs officiels