Each year, the United States Postal Service (USPS) publishes a Philatelic catalog of the stamps and commemorative material produced for that year. RESOURCESStamp Smarter website (a collection of all the USPS Philatelic catalog)https://stampsmarter.org/Learning/PostalPhilatelicCats.htmlUSPS Philatelic Catalog (Publication 508) requesthttps://about.usps.com/publications/pub9/PUB9_508.htm