The Three Choirs Festival is a music festival held annually at the end of July, rotating among the cathedrals of the Three Counties (Hereford, Gloucester and Worcester) and originally featuring their three choirs, which remain central to the week-long programme. The large-scale choral repertoire is now performed by the Festival Chorus, but the festival also features other major ensembles and international soloists. The 2011 festival took place in Worcester from 6 to 13 August. The 2012 festival in Hereford took place earlier than usual, from 21 to 28 July, to avoid clashing with the 2012 Summer Olympics. The event is now established in the last week of July. The 300th anniversary of the original Three Choirs Festival was celebrated during the 2015 festival, which took place from 25 July to 1 August in Hereford (the landmark 300th meeting of the Three Choirs does not fall until 2027 due to there being no Three Choirs Festivals for the duration of both WW1 and WW2).
The festival is closely identified with the musical careers of British composers Edward Elgar and Ralph Vaughan Williams. The organists of the three cathedrals (who act as artistic director and festival conductor when it is their cathedral's turn to host the festival) are Geraint Bowen (Hereford), Adrian Partington (Gloucester) and Peter Nardone (Worcester).
The festival, originally held over two days in September (but also held in September in 1933 and 1947, since C. S. Lewis's brother Warren is known to have attended), is one of the world's oldest classical choral music festivals. Publicity for it in 1719 addressed "Members of the yearly Musical Assembly in these parts". Its music obviously tended towards the ecclesiastical. In early gatherings, Purcell's setting of the Te Deum and Jubilate was a regular part of the repertoire until 1784, and Handel dominated 18th-century programmes with oratorios such as Alexander's Feast, Samson, Judas Maccabaeus and Messiah. Sir Samuel Hellier, guardian of the Hellier Stradivarius, was a "prominent figure". Haydn's The Creation was heard first in the festival of 1800. From 1840, Mendelssohn's Elijah was performed every year until 1930.