Féis

A Féis (Irish pronunciation: [fʲɛʃ]) or Fèis (Scottish Gaelic pronunciation: [feːʃ]) is a traditional Gaelic arts and culture festival. The plural forms are féiseanna (Irish: [ˈfɛʃənə]) and fèisean (Scottish Gaelic: [ˈfeːʃən]). The term "féis" is commonly used referring to Irish dance competitions and, in Scotland, to immersive teaching courses, specialising in traditional music and culture.

In Ancient Ireland communities placed great importance on local festivals, where Gaels could come together in song, dance, music, theatre and sport. The largest of these was the Aonach, the great festival at Tara, which was then the city of Ireland's Ardrí, or "High King".

These féiseanna were a rich opportunity for storytellers to reach a large audience, and often warriors would recount their exploits in combat, clansmen would trace family genealogies, and bards and balladeers would lead the groups in legends, stories, and song.

These gatherings eventually gave rise to athletic and sporting competitions, including horse- and chariot-racing, as well as feats of strength and endurance.

Today the Féis has experienced something of a rebirth, both for ethnic Gaels and for enthusiasts of the Gaelic culture in Ireland and Scotland, as well as throughout the world.

Féiseanna are generally centred on Irish Dancing or simply 'Féis'

...
Wikipedia