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 April 2024
| Anniversary | Details |
| 5th | The hottest Easter Monday on record in all four nations of the UK is confirmed by the Met Office, with 25C (77F) reported at Heathrow, Northolt and Wisley. (22nd Apr 2019) |
| 5th | 29-year-old journalist and author Lyra McKee is shot dead amid rioting in Derry, Northern Ireland, with police treating it as a "terrorist incident" and suspecting the New IRA. (18th Apr 2019) |
| 5th | Demonstrations by the climate change activist group Extinction Rebellion cause disruption in central London, blocking roads and resulting in over 1,000 arrests, with 53 people charged for various offences. A "pause" in the protest is announced on 21 April, although the group continues to base itself in Marble Arch. (17th Apr 2019) |
| 5th | Former UKIP leader Nigel Farage launches the Brexit Party. (12th Apr 2019) |
| 5th | WikiLeaks co-founder Julian Assange is arrested after seven years of living in the Ecuadorian embassy in London. (11th Apr 2019) |
| 5th | The UK and the EU agree an Article 50 extension to 31 October 2019. No reopening of the withdrawal agreement negotiations is allowed and the UK "must hold the elections to the European Parliament" on 23 May, or it will be forced to leave on 1 June 2019. (10th Apr 2019) |
| 5th | Department store Debenhams goes into administration, after a last-ditch rescue offer from Mike Ashley's Sports Direct was rejected. (9th Apr 2019) |
| 5th | London's Ultra-Low Emission Zone comes into effect. (8th Apr 2019) |
| 10th | Following a trial at Southwark Crown Court, publicist Max Clifford is convicted of eight indecent assaults on women and girls. (28th Apr 2014) |
| 10th | Chief Secretary to the Treasury Danny Alexander announces that Cornish people will be granted minority status under Council of Europe rules governing the protection of national minorities. (24th Apr 2014) |
| 10th | The Anglican Diocese of Leeds, created by merger of the Church of England's West Yorkshire dioceses of Ripon & Leeds, Bradford and Wakefield, comes into being. (20th Apr 2014) |
| 20th | Landmark office building 30 St Mary Axe ("The Gherkin") in the City of London, designed by Norman Foster, opens. (28th Apr 2004) |
| 50th | The Metropolitan and non-metropolitan counties come into being. (1st Apr 1974) |
| 60th | BBC Two begins scheduled broadcasting; its first programme is Play School. (21st Apr 1964) |
| 60th | The National Trust reopens the southern section of the Stratford-upon-Avon Canal, the first major restoration of a canal for leisure use. (11th Apr 1964) |
| 60th | Runcorn, a small town in north Cheshire, is designated as a new town. Extensive developments are predicted to inflate the town's population to around 70,000 by 1981. (10th Apr 1964) |
| 60th | Ministry of Defence takes over the duties of the War Office, Admiralty, and Air Ministry, which cease to exist. The title of Lord High Admiral is re-vested in the Monarch. (1st Apr 1964) |
| 75th | Twelve nations sign the North Atlantic Treaty creating the North Atlantic Treaty Organization. (4th Apr 1949) |
| 80th | Allied convoy T4, forming part of amphibious Exercise Tiger (a full-scale rehearsal for the Normandy landings) in Start Bay off the Devon coast, is attacked by E-boats, resulting in the deaths of 749 American servicemen. (28th Apr 1944) |
| 90th | Percy Shaw patents the cat's eye road-safety device. (3rd Apr 1934) |
| 90th | Surgeon R.K. Wilson allegedly takes a photograph of the Loch Ness Monster. (1st Apr 1934) |
| 100th | Harry Grindell Matthews demonstrates his "death ray" in London but fails to convince the War Office. (26th Apr 1924) |
| 125th | The St. Andrew's Ambulance Association is granted a Royal Charter by Queen Victoria. (18th Apr 1899) |
| 150th | The first civic public park, is opened in Birkenhead. (5th Apr 1874) |
| 275th | First performance of Handel's Music for the Royal Fireworks in Green Park, London. (27th Apr 1749) |
Alternatively, see all anniversaries for this month.
Or... select a different date below:
