Humans have been exchanging tokens of friendship since before recorded history. From calling cards to Valentines to Christmas cards, the modern greeting card industry evolved.

Research:

• “America’s First Christmas Card.” Albany Institute of History and Art. https://www.albanyinstitute.org/online-exhibition/50-objects/section/america-s-first-christmas-card
• Britannica Editors. "scarab". Encyclopedia Britannica, 3 Apr. 2014, https://www.britannica.com/topic/scarab
• Britannica Editors. "greeting card". Encyclopedia Britannica, 15 Mar. 2024, https://www.britannica.com/topic/greeting-card
• Brown, Ellen F. “Christmas, Inc.: A Brief History of the Holiday Card.” JSTOR Daily. Dec. 20, 2015. https://daily.jstor.org/history-christmas-card-holiday-card/
• Chase, Ernest Dudley. “The Romance of Greeting Cards.” Rust Craft. Cambridge, MA. 1956.
• “Dali at Hallmark.” Hallmark Art Collection. https://www.hallmarkartcollection.com/creatively-thinking/stories/dali-at-hallmark/
• “Esther Howland 1847.” Mount Holyoke. https://www.mtholyoke.edu/directory/alum/esther-howland
• Evans, Elaine Altman. “The Sacred Scarab, Occasional Paper.” McClung Museum of Natural History and Culture. University of Tennessee. January 1, 1996. https://mcclungmuseum.utk.edu/1996/01/01/sacred-scarab/
• Greeting Card Association. “The History of Greeting Cards.” https://www.greetingcard.org/history/
• Hanc, John. “The History of the Christmas Card.” Smithsonian. Dec. 9, 2015. https://www.smithsonianmag.com/history/history-christmas-card-180957487/
• Henry, William E. “Art and Cultural Symbolism: A Psychological Study of Greeting Cards.” The Journal of Aesthetics and Art Criticism, vol. 6, no. 1, 1947, pp. 36–44. JSTOR, https://doi.org/10.2307/426176
• Kavanagh, Marybeth. “Louis Prang, Father of the American Christmas Card.” The New York Historical. Dec. 19, 2012. https://www.nyhistory.org/blogs/prang
• Koon, Wee Kek. “How ancient Chinese new year cards went from elites’ greetings to bribery instruments.” South China Morning Post. Jan. 31, 2026. https://www.scmp.com/lifestyle/chinese-culture/article/3341675/how-ancient-chinese-new-year-cards-went-elites-greetings-bribery-instruments?module=perpetual_scroll_0&pgtype=article
• Korolkov, Maxim. “‘Greeting Tablets’ in Early China: Some Traits of the Communicative Etiquette of Officialdom in Light of Newly Excavated Inscriptions.” T’oung Pao, vol. 98, no. 4/5, 2012, pp. 295–348. JSTOR, http://www.jstor.org/stable/41725988
• Lee, Ruth Webb. “A History of Valentines.” 1984.
• Newberry, Percy E. “Scarabs: An Introduction to the Study of Egyptian Seals and Signet Rings.” London. Archibald Constable and Co. Ltd. 1908. https://dn790001.ca.archive.org/0/items/scarabsintroduc00newbuoft/scarabsintroduc00newbuoft.pdf
• Purcell, Denise. “Authentic Messaging and Independent Makers Drive Greeting Cards' Next-Gen Relevance.” U.S. Chamber of Commerce. https://www.uschamber.com/co/good-company/launch-pad/greeting-card-next-gen-relevance#:~:text=The%20category%20is%20massive:%20According,card%20market%20at%20$7%20billion.
• Grafton, Samuel. “Holly Leaf and Copper Plate.” The North American Review, vol. 226, no. 6, 1928, pp. 660–64. JSTOR, http://www.jstor.org/stable/25110633
• Shoichet, Catherine E. “This ‘visionary’ woman changed the way many Americans celebrate Valentine’s Day.” CNN. Feb. 14, 2024. https://edition.cnn.com/2024/02/13/style/esther-howland-valentines-card-history-cec
• Schmidt, Leigh Eric. “The Commercialization of the Calendar: American Holidays and the Culture of Consumption, 1870-1930.” The Journal of American History, vol. 78, no. 3, 1991, pp. 887–916. JSTOR, https://doi.org/10.2307/2078795
• Stupperich, Andy. “Art Education: Louis Prang's Christmas Card Competitions.” The Henry Ford Museum. January 29, 2026. https://www.thehenryford.org/collections/explore/articles/art-education-louis-prang%27s-christmas-card-competitions
• Terrell, Ellen. “Esther Howland and the Business of Love.” Library of Congress. March 23, 2016. https://blogs.loc.gov/inside_adams/2016/03/esther-howland-and-the-business-of-love/
• “World's first printed Valentine's Card.” A History of the World. BBC. 2014. https://www.bbc.co.uk/ahistoryoftheworld/objects/L1NM_6mWRymAMKXcRDlXJA
• Wright, Helena E. “A winning design: Prang’s Christmas card contests of the 1880s.” National Museum of American History. December 23, 2019. https://americanhistory.si.edu/explore/stories/winning-design-prangs-christmas-card-contests-1880s

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This 2019 episode covers the color blue, the most popular color in many parts of the world. But many ancient languages didn’t have a word for blue, and some languages still don’t.

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Tracy shares struggles that she encountered pulling together this edition of Unearthed. She and Holly have a tangential discussion about AI.

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