* Phllby has a key role in Mike Ripley's short story " Gold Sword " published in ' John Creasey's Crime Collection 1990 ' which was chosen as BBC Radio 4's Afternoon Story to mark the 50th anniversary of D-Day on 6th June 1994.

On 12 April 2010, the military forces of Somalia's autonomous Puntland region staged a military parade to mark the 50th anniversary of Armed Forces Day.

In 2011, Russia issued a 1, 000 ruble coin ( gold ) and 3 ruble coin ( silver ) to mark the 50th anniversary of his flight.

* August 6 – Hundreds in Hiroshima, Nagasaki, Washington, D. C., and Tokyo mark the 50th anniversary of the dropping of the atomic bomb.

The fair was originally conceived in 1955 to mark the 50th anniversary of the 1909 Alaska-Yukon-Pacific Exposition, but it soon became clear that that date was too ambitious.

In November 2003, the Natural History Museum in London held an exhibition to mark the 50th anniversary of its exposure.

The National Academy of Sciences scheduled some seminars to mark the 50th anniversary of the International Geophysical Year, which were the only official observances known.

On 27 September 2009, to mark the 50th anniversary of the closing of the airport, an 11-plane flypast ( including 8 biplanes ) took place ( although it had initially been announced that there would be 12 aeroplanes flying ).

In June 1984, at the Grand Theatre, Leeds, the Delius Trust sponsored a commemorative production of A Village Romeo and Juliet by Opera North, to mark the 50th anniversary of Delius's death.

In 2010, a joint American-Canadian Annual Gathering was held in Dearborn, Michigan, to mark the 50th anniversary of Mensa in North America.

* UKTV History aired the BBC co-produced drama documentary Surviving Disaster to mark the 50th anniversary of the tragedy.

The first of these is the ' Brooklands Memorial ' built by Vickers-Armstrongs to mark the 50th anniversary of the opening of the Motor Course and was unveiled by Lord Brabazon of Tara in July 1957.

On 29 October 2005, Family Fortunes returned as the " grand final " of Ant & Dec's Gameshow Marathon, a series of revivals of former popular ITV game shows shown to mark the channel's 50th anniversary, and hosted by its most ubiquitous presenters of recent years.

In 1986, it decided to mark its 50th anniversary under the Time Inc. umbrella with a special issue showing every Life cover starting from 1936, which of course included the issues that were published during the six-year hiatus in the 1970s.

The University of Queensland ( UQ ) was established on 10 December 1909 by the Queensland Parliament to mark the 50th anniversary of Queensland ’ s independence from New South Wales.

Cantona made his first appearance for Manchester United in a friendly match against Benfica in Lisbon to mark Eusébio's 50th birthday, wearing the number 10 shirt.

The modern five-pound issues are not issued for circulation, but to mark events or commemorations of national or Royal significance, including the following: Queen Mother 90th birthday ( 1990 ); 40th anniversary of the Coronation ( 1993 ); 70th birthday of Queen Elizabeth II ( 1996 ); Golden Wedding of Queen Elizabeth II and Prince Philip ( 1997 ); Prince of Wales ' 50th birthday ( 1998 ); Diana, Princess of Wales Memorial ( 1999 ); Millennium commemoration ( 1999 & 2000 ); Queen Mother Centenary ( 2000 ); Queen Victoria anniversary ( 2001 ); Queen Elizabeth II Golden Jubilee ( 2002 ); Queen Mother Memorial ( 2002 ); Queen Elizabeth II Coronation 50th anniversary ( 2003 ); Centenary of the Entente Cordiale ( 2004 ); 200th anniversary of the Battle of Trafalgar ( 2005 ); 200th anniversary of the death of Horatio Nelson ( 2005 ); 80th birthday of Queen Elizabeth II ( 2006 ); Diamond Wedding of Elizabeth II and Prince Philip ( 2007 ) 60th birthday of Prince of Wales ( 2008 ).

A Golden Jubilee is a celebration held to mark a 50th anniversary.

During the 2008 – 2009 academic year the College at Florham celebrated a year-long celebration to mark the 50th anniversary of that campus.

Sibley's first programme was Three Cheers for Pooh, broadcast on BBC Radio 4 on 14 October 1976 to mark the 50th anniversary of the publication of A.

A limited edition " Anniversary " model was introduced to mark Saab's 50th anniversary, featuring leather seats embossed with the classic, aircraft-inspired Saab logo and a colour-keyed body kit.

Hungarian Prime Minister Ferenc Gyurcsány referred to this famous Time Man of the Year cover as " the faces of free Hungary " in a speech to mark the 50th anniversary of the 1956 uprising.

Ostankino was built to mark the 50th anniversary of the October Revolution.

In 1993 to mark the 25th anniversary it was decided to choose a Booker of Bookers Prize.

In February 2006, the International Astronomical Union announced the naming of asteroid 79896 Billhaley to mark the 25th anniversary of Bill Haley's death.

To mark the 30th anniversary of Engelbart's 1968 demo, in 1998 the Stanford Silicon Valley Archives and the Institute for the Future hosted Engelbart's Unfinished Revolution, a symposium at Stanford University's Memorial Auditorium, to honor Engelbart and his ideas.

* BBC Domesday Project, a partnership between Acorn Computers Ltd, Philips, Logica and the BBC with some funding from the European Commission's ESPRIT programme, to mark the 900th anniversary of the original Domesday Book, an 11th century census of England.

The Garden of Remembrance ( Dublin ) | Garden of Remembrance was opened in 1966, to mark the anniversary of the Rising.

On 4 March 2004, at a gala ceremony in London, to mark the 100th anniversary of the foundation of the Fédération Internationale de Football Association ( FIFA ), the international governing body of football revealed the FIFA 100.

Celebrations were staged in 1966 to mark the 600th anniversary of the founding of the town.

* Canada Post issued a pair of 14-cent stamps to mark the 200th anniversary of Captain Cook's arrival at Nootka Sound on Vancouver Island on 26 April 1978.

On 25 April 2005, to mark the 90th anniversary of the Gallipoli landing, government officials from Australia and New Zealand, most of the last surviving Gallipoli veterans, and many Australian and New Zealand tourists traveled to Turkey for a special dawn service at Gallipoli.

To mark the 800th anniversary of Celestine's birth, Pope Benedict XVI proclaimed the Celestine year from 28 August 2009 through 29 August 2010.

* The Folio Society published a limited edition ( 1, 000 copies ) of the Rubáiyát to mark the 150th anniversary.

To mark the fiftieth anniversary of the beginning of Vatican II, in October 2011, the Vatican's website and many other Catholic news organizations announced that the Pope Benedict XVI, had made the period from October 2012 to the end of November 2013 ( the Solemnity of Christ the King ) a " Year Of Faith " in a solemn declaration, and ordered all parishes and religious institutions to find some manner during that Year of celebrating and reaffirming the Creed ( there are now two main Creeds-the shorter Apostle's Creed and the lengthier Niceno-Constantopolitan, or Nicene Creed.

Roy Grönneberg, who founded the local chapter of the Scottish National Party in 1966, designed the flag of Shetland in cooperation with Bill Adams to mark the 500 year anniversary of the transfer of the islands from Norway to Scotland.

A limited edition, The Freak Show Special Edition, was released in 2002 to mark their 30th anniversary.

To mark the 20th anniversary of her debut album Little Earthquakes ( 1992 ), Amos is releasing an album of songs from her back catalogue re-worked and re-recorded with the Metropole Orchestra.

In December in Pyongyang, to mark the 20th anniversary of Sun Myung Moon's visit to the DPRK, de jure President Kim Yong-nam hosted the new President in the official residence.

Rumours abounded of a renewal of activity to mark the 30th anniversary of the band's debut as a four-piece and the re-release of Pink Flag.

On March 31, 2009, Yoko Ono went to the inauguration of the exhibition: " Imagine: The Peace Ballad of John & Yoko " to mark the 40th anniversary of Lennon-Ono bed-in at the Queen Elizabeth Hotel in Montreal, Canada from May 26 to June 2, 1969.

* October 12 – To mark the 400th anniversary Columbus Day holiday, the " Pledge of Allegiance " is first recited in unison by students in U. S. public schools.

* August 6 – In Hiroshima, tens of thousands mark the 40th anniversary of the atomic bombing of the city.

Hamlet was performed in the castle for the first time to mark the 200th anniversary of the death of William Shakespeare, with a cast consisting of soldiers from the castle garrison.