St David's Day is celebrated on March 1st, which some people argue should be a public holiday in Wales (although others disagree). Other days which have been proposed for public commemorations are September 16th (the day on which Owain Glyn Dwr's rebellion began) and November (the death of Llywelyn the Last).
However, the traditional seasonal festivals in Wales were Calan Gaeaf (Hallowe'en), Calan Mai, and Midsummer. Additionally, each parish celebrated a Gwyl Mabsant in commemoration of its native saint.
Perhaps the most well-known muscial image of Wales is that of the choir, in particular the male voice choir (Welsh: cor meibion). While this is certainly a part (though of greatly diminished importance) of the current musical life of the nation, it is by no means the only or the oldest part, and the choral tradition does not really stretch back significantly beyond its heyday in the 19th Century.
Much older is the tradition of instrumental folk music. The harp has been closely associated with Wales for a very long time, and one kind of harp, the triple harp is uniquely Welsh. Other specifically Welsh instruments included the crwth and the pibgorn, though both fell out of general use by the end of the 18th century. Due to Nonconformist Christian disapproval, the instrumental folk tradition fell into decline through the 19th and early 20th centuries, but has since seen a revival and is now arguably as strong as ever. The principal instruments are the harp and the fiddle, but many other instruments are used, and both the crwth and pibgorn are again being played by a small but growing number of people.
Wales also has a long tradition of folk song which, like the instrumental tradition, and for the same reasons, was long in decline but is now flourishing again. One notable kind of Welsh song is cerdd dant which, loosely, is an improvised performance following quite strict rules in which poetry is sung to one tune against the accompaniment of (usually) a harp to a different tune.
In the mid to late 1990s new Welsh music became unexpectedly fashionable, with the chart successes of bands including Manic Street Preachers, Catatonia and Stereophonics. These groups helped the media at the time invent the epithet 'Cool Cymru', an answer to Britpop's Cool Britannia. Prior to that, Welsh acts including The Alarm, Shakin' Stevens and Bonnie Tyler had all had high profiles, but there had never been much of a movement.
The Welsh music industry is currently in rude health, with boundless creativity from many lesser known groups, and labels such as Ankstmusik, Crai and Boobytrap. And, in recent years, a large alternative and punk scene has sprung up from the Valleys towns in south Wales, of which Lostprophets and Funeral For A Friend have achieved notable international success. Old School Punk Rock band, the notorious Picture Frame Seduction have even reformed. PFS from Haverfordwest in Pembrokeshire, West Wales created their own disturbing punk sound in 1978, and in 2003 they signed to Grand Theft Audio Records in Los Angeles, USA. They were once dubbed the ' Welsh Sex Pistols ' due to their attitude towards the music establishment in the UK.