I often wonder what significant anniversaries are due at some point in the future as some of them might be of interest as triggers for blog posts or visits somewhere. However, it is often difficult to find out quickly what events have significant anniversaries - hence this section on the website.
By "significant anniversaries", I mean dates that are not, for example, the 73rd anniversary of something, but the 50th, 100th, 200th etc.
It should help to flag up interesting events.
Significant anniversaries during May 2015
| Anniversary | Details |
| 1st | A major fire damages Glasgow School of Art, one of Scotland's most iconic buildings, for the first time. (23rd May 2014) |
| 5th | Netto announced the sale of all its UK stores to Asda in a £778 million deal. (27th May 2010) |
| 5th | After a month of disruption, flight restrictions were lifted at all British airports after the volcanic ash over the nation's airspace moved away. (17th May 2010) |
| 5th | Stephen Timms, Labour MP and former treasury minister, was wounded in a stabbing in his East Ham constituency in Newham, London. (14th May 2010) |
| 5th | With a coalition government between the Conservatives and Liberal Democrats still being finalised, David Cameron was appointed Prime Minister by the Queen following Brown's resignation. (11th May 2010) |
| 10th | George Galloway, Respect Party MP for Bethnal Green and Bow, appears before the United States Senate to defend himself against charges that he profited from Saddam Hussein's regime, launching a tirade against the Senators who had accused him and attacking the war in Iraq. (17th May 2005) |
| 10th | Malcolm Glazer gains control of Manchester United after securing a 70% share, ending more than thirty years of ownership by the Edwards family. (12th May 2005) |
| 10th | The Sellafield nuclear plant's Thorp reprocessing facility in Cumbria, is closed down due to the confirmation of a 20 tonne leak of highly radioactive uranium and plutonium fuel through a fractured pipe. (9th May 2005) |
| 40th | Jim'll Fix It, presented by Jimmy Savile, first shown on BBC1 television. (31st May 1975) |
| 40th | The Dibble's Bridge coach crash near Grassington, North Yorkshire, England kills 32 - the highest ever death toll in a road accident in the United Kingdom. (27th May 1975) |
| 40th | Dibbles Bridge coach crash: a tour coach ran away following brake failure and falls off a bridge near Hebden, North Yorkshire, en route to Grassington, killing the driver and 31 women pensioners on board. (27th May 1975) |
| 50th | An underground explosion at Cambrian Colliery in Clydach Vale kills 31. (17th May 1965) |
| 50th | The National Trust officially launches its long-term Enterprise Neptune project to acquire or put under covenant a substantial part of the Welsh, English and Northern Irish coastline. (11th May 1965) |
| 60th | Anthony Eden wins the general election for the Conservative Party with a majority of 31 seats, an improvement on the 17-seat majority gained by his predecessor Sir Winston Churchill four years ago. (27th May 1955) |
| 70th | William Joyce, known as "Lord Haw-Haw" is captured. He is later charged with high treason in London for his English-language wartime broadcasts on German radio. He is hanged in January 1946. (28th May 1945) |
| 70th | German forces in the Channel Islands, the only occupied part of the British Isles, surrender. (12th May 1945) |
| 70th | World War II: The Channel Islands are liberated by the British after five years of German occupation. (9th May 1945) |
| 70th | World War II: V-E Day, combat ends in Europe. German forces agree in Rheims, France, to an unconditional surrender. (8th May 1945) |
| 70th | V-E Day is celebrated throughout the UK. Churchill makes a victory speech and appears on the balcony of Buckingham Palace. Street parties take place throughout the country. (8th May 1945) |
| 75th | Winston Churchill makes his "blood, toil, tears, and sweat" speech to the House of Commons. (13th May 1940) |
| 75th | World War II: The first German bombs of the war fall on England at Chilham and Petham, in Kent. (10th May 1940) |
| 75th | World War II: Winston Churchill is appointed Prime Minister (10th May 1940) |
| 75th | The Norway Debate in the House of Commons begins, and leads to the replacement of Prime Minister Neville Chamberlain with Winston Churchill three days later. (7th May 1940) |
| 80th | The driving test becomes compulsory. (31st May 1935) |
| 80th | The last purely Liberal government ends when Prime Minister Herbert Asquith decides to form an all-party coalition, precipitated by reports in the press of deficiencies in the supply of shells for the army. (17th May 1935) |
| 100th | Zeppelins raid London for the first time. (31st May 1915) |
| 100th | Three trains collide in the Quintinshill rail crash near Gretna Green, Scotland, killing 227 people and injuring 246; the accident is found to be the result of non-standard operating practices during a shift change at a busy junction. (22nd May 1915) |
| 100th | Quintinshill rail disaster near Gretna Green in Scotland: collision and fire kill 226, mostly troops, the largest number of fatalities in a rail accident in the UK. (22nd May 1915) |
| 100th | The last British Liberal Party government (led by Herbert Henry Asquith) falls. (17th May 1915) |
| 100th | British ocean liner RMS Lusitania is sunk by Imperial German Navy U-boat U-20 off the south-west coast of Ireland, killing 1,198 civilians en route from New York to Liverpool. (7th May 1915) |
| 150th | The Mimosa sets sail, carrying Welsh emigrants to Patagonia. (28th May 1865) |
| 175th | The transporting of British convicts to the New South Wales colony is abolished. (22nd May 1840) |
| 175th | York Minster is badly damaged by fire (20th May 1840) |
| 175th | The Penny Black postage stamp becomes valid for use in the UK. (6th May 1840) |
| 175th | The Penny Black, the first official adhesive postage stamp, is issued in the United Kingdom. (1st May 1840) |
| 250th | HMS Victory is launched at Chatham Dockyard; it is the oldest naval ship still in commission. (7th May 1765) |
| 300th | "Edmund Halley's" total solar eclipse (the last one visible in London for almost 900 years). (3rd May 1715) |
| 500th | Mary Tudor, Queen of France and Charles Brandon, 1st Duke of Suffolk are officially married at Greenwich. (13th May 1515) |
| 600th | Religious reformers John Wycliffe and Jan Hus are condemned as heretics at the Council of Constance. (4th May 1415) |
| 800th | Rebel barons renounce their allegiance to King John of England - part of a chain of events leading to the signing of the Magna Carta. (5th May 1215) |
Alternatively, see all anniversaries for this month.
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