Beltane

Noun

Bel=tane

CIDE DICTIONARY

Beltane, n. [Gael. bealltainn, bealltuinn.].

The first day of May (Old Style). [1913 Webster]
"The quarter-days anciently in Scotland were Hallowmas, Candlemas, Beltane, and Lammas." [1913 Webster]
A festival of the heathen Celts on the first day of May, in the observance of which great bonfires were kindled. It still exists in a modified form in some parts of Scotland and Ireland. [1913 Webster]

Beltane, n. an ancient Celtic festival celebrated on May Day.

Etymology

Gael. bealltainn