To the ancient Celts, May Day marked the start of summer, and a critical time when the boundaries between the human and supernatural worlds were removed, requiring that people take special measures to protect themselves against enchantments. The Beltane fire festival originated in a summer ritual in which cattle were herded between two huge bonfires to protect them from evil and disease. The word Beltane has been used in English since the 15th century, but the earliest known instance of the word in print—as well as the description of that summer ritual—appears in an Irish glossary commonly attributed to Cormac, a king and bishop who lived in the south of Ireland near the end of the first millennium.
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May Day also refers to the Gaelic and Celtic festival Beltane, which celebrates the transition from spring to summer.—
Jeanine Santucci,
USA Today,
1 May 2026 When Julia returns from Beltane, Lord Lovat (Tony Curran) and Davina (Sara Vickers) call for the town's women, local midwives, and mothers to stay with Julia during her confinement.—
Maureen Lee Lenker,
Entertainment Weekly,
6 Sep. 2025 She's promised to Malcolm Grant (Jhon Lumsden) and is at Beltane to ostensibly cement their promise to each other.—EW.com,
30 Aug. 2025 In the fifth episode, which takes place almost entirely at an annual spring festival called Beltane, Ellen makes up an excuse to sneak away from Malcolm for a few hours and decides to take her relationship with Brian to the next level.—
Max Gao,
HollywoodReporter,
29 Aug. 2025 Ellen returns to Beltane and dons her May Queen attire and performs her duties alongside Malcolm at the fire ceremony.—
Maggie Fremont,
Vulture,
29 Aug. 2025 Remember how Julia was planning to help Brian at the Beltane festival, in exchange for his aid in escaping Castle Leathers?—
Kimberly Roots,
TVLine,
29 Aug. 2025 May carries the essence of Beltane, a Gaelic festival celebrating fertility, creativity, and abundance.—
Matt Rozo,
Mercury News,
20 May 2025
Word History
Etymology
Middle English (Scots), May 1 or 2, from Scottish Gaelic bealltain