Six Nations
February/March
International annual rugby contest.
Millennium Stadium
Website: www.rbs6nations.com 

Worthington Cup Final
Early March
Culmination of the world's oldest football competition.
Millennium Stadium

Rugby League Challenge Cup Final
Late April
Millennium Stadium

FA Cup Final
May
The annual culmination of the oldest football competition in the world.
Millennium Stadium
Website: www.thefa.com

Cardiff Singer of the World
Late June
St David's Hall
Website: www.bbc.co.uk/cardiffsinger

Everyman Open Air Theatre Festival
July-August
Theatre performances.
St Fagans National History Museum
Website: www.everymanfestival.co.uk

Cardiff International Food & Drink Festival
July
Tastings, demonstrations and food shows.
Cardiff Bay
Website: www.cardiff-festival.com 

Welsh Promenade Concert
Mid July
Classical music.
St David's Hall
Website: www.welshproms.co.uk

Admiral Cardiff Big Weekend
August
The UK's biggest free outdoor musical festival.
Cardiff Civic Centre
Website: www.cardiff-festival.com

Cardiff MAS Carnival
August
Three-day carnival celebrations at various venues in the city centre.
Website: www.cardiff-festival.com

Mermaid Quay Cardiff Harbour Festival
August
Family festival with nautical theme.
Cardiff Harbour
Website: www.cardiff-festival.com

Brecon Jazz Festival
August
International jazz festival attracting international stars.
Brecon, not far from Cardiff
Website: www.breconjazz.co.uk

Lesbian and Gay Mardi Gras
September
One of the biggest of its kind in the UK.
Cooper's Field, just behind Cardiff Castle
Website: www.cardiffmardigras.co.uk

International Festival of Musical Theatre
October-November
Various venues
Website: www.cardiffmusicals.com

Cardiff Film Festival
Late November
Chapter Arts Centre and UCI
Website: www.cardifffilmfestival.co.uk

Wales Rally GB
December
The UK leg of the World Rally Championship.
Welsh valleys and the Millennium Stadium
Website: www.walesrallygb.com

Calennig Christmas and New Year Celebrations
December-January
Various venues in the city centre

The Royal National Eisteddfod (website: www.eisteddfod.org.uk), the largest annual festival of competitive music making and poetry writing in Europe, takes place alternately in North and South Wales in early August each year.

A good source of information about events in Cardiff can be found on the council's website: www.cardiff.gov.uk/eventscalendar.