Calan Mai

== Welsh == === Etymology === calan (“calends”) +‎ Mai (“May”). === Noun === Calan Mai m May Day (Welsh celebration with parallels to Beltane and Walpurgisnacht) ==== Related terms ==== Dydd Calan (“New Year's Day”) === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “Calan Mai”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies