Nos Galan Gaeaf

== Welsh == === Etymology === Literally, “the Eve of the Calends of Winter”, or more loosely translated as “All Hallows' Eve”. === Noun === Nos Galan Gaeaf f (not mutable) Halloween, All Hallows' Eve === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “Nos Galan Gaeaf”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies