Arthur's Day was an annual series of music events worldwide, originally organised by Diageo in 2009 to promote the 250th anniversary of its Guinness brewing company.

[2] Notable high-profile names who later spoke out against Arthur's Day include: director Lenny Abrahamson, singer-songwriter Christy Moore, and musician Mike Scott of The Waterboys.

[3] The Royal College of Physicians Ireland highlighted a 30% increase in ambulance call-outs on each successive Arthur's Day and a doubling in alcohol-related liver disease over the previous decade, associated with drink promotion and the relative cheapness of alcohol.

[16][17] Other acts include The Blizzards, The Chakras, The Chapters, Concerto For Constantine, The Coronas, Jamie Cullum, Dirty Epics, The Enemy, Mick Flannery, General Fiasco, David Gray, Calvin Harris, Richard Hawley, The High Kings, Hoarsebox, David Holmes, The Infomatics, Jerry Fish & The Mudbug Club, David Kitt, The Kooks, The Magic Numbers, Roots Manuva, Imelda May, Fiona Melady, Mystery Jets, Noah and the Whale, Noise Control, Paolo Nutini, OK Go, Oppenheimer, Razorlight, Fionn Regan, Republic of Loose, Reverend and The Makers, Sharon Shannon, Soul II Soul, The Undertones, White Belt Yellow Tag and The Wombats.

Acts that performed on the day included Imelda May, Newton Faulkner, Empire Saints, Sharon Shannon, The Magic Numbers, David Gray.

[14] On 3 June 2010, Arthur's Day 2010 was confirmed and the following acts were announced: Snow Patrol, Paolo Nutini, José González, Royseven, The View, We Have Band, MILK, Broken Records, Mick Flannery, The Rags, John Spillane, Jay Sean, The Hoosiers, Slow Club, The Maccabees, The Magic Numbers, Sharon Shannon, The High Kings, The Chapters, The Dirty 9s, Heathers and Dirty Epics.

The Guinness Arthur's Day 2010 was held on 24 September 2010 (GMT/UTC +8) at Surf Beach @ Sunway Lagoon and featured performances by Flo Rida, Sean Kingston, Colby O'Donis, Mizz Nina, Pop Shuvit, Thaitanium, Melissa Indot and DJ Fuzz.

The event held at Speed City @ Selangor Turf Club was attended by an estimated crowd of 10,000 and featured performances by Taio Cruz, Mizz Nina, Soler, Dragon Red, Prema Yin, Joe Flizzow, Take-T (Japan) and Dandee (Thailand).

Internationally renowned artist The Script performed at the Pullman Hotel Ballroom in Jakarta on 12 November in front of more than 5000 fans who joined to toast the great Arthur Guinness.

The Guinness Arthur's Day Indonesia road show continued; with the American Rock group MR. BIG performing in Medan, Surabaya and Makassar.

MR. BIG hit Medan on 3 December at Pardede Hall with collaboration from Indonesian rock band /rif, and performed in front of 4000 people who joined the celebration.

Example, Tinie Tempah, Ellie Goulding, Mika, Professor Green, Fatboy Slim, Texas and Amy Macdonald have been confirmed as headline acts for Arthur's Day 2012.

Also on the bill were Picturehouse, Mundy, Walking on Cars, Dove, The Vals, The Rapparee, The Bonnevilles, Lilygreen & Maguire, The Heads of State, Ard Rí, Midnight Graffiti, Fiddler's Green, Ruaile Buaile, Willie Byrne, Gentry Morris, Shane Butler, Jaker and Brush Shiels.

[26] On 12 August 2013, the line-up for the 2013 Arthur's day was announced, with The Script, Emeli Sande, Bobby Womack and Manic Street Preachers, among others, headlining the acts that will be playing.

[32] On 24 September, a live studio debate which included Guinness executive Peter O'Brien was held on Prime Time on RTÉ One discussing the pros and cons of Arthur's day.