Operation Demetrius was a British Army operation in Northern Ireland on 9–10 August 1971, during the Troubles.
 It involved the mass arrest and internment (imprisonment without trial) of 342 people suspected of being involved with the Irish Republican Army (IRA), which was waging a campaign for a united Ireland against the British state.
 It was proposed by the Northern Ireland Government and approved by the British Government.
 Armed soldiers launched dawn raids throughout Northern Ireland, sparking four days of violence in which 20 civilians, two IRA members and two British soldiers were killed.
 All of those arrested were Irish nationalists, the vast majority of them Catholic.
 Due to faulty intelligence, many had no links with the IRA.
 Ulster loyalist paramilitaries were also carrying out acts of violence, which were mainly directed against Catholics and Irish nationalists, but no loyalists were included in the sweep.
The Shankill Butchers was an Ulster loyalist gang—many of whom were members of the Ulster Volunteer Force (UVF)—that was active between 1975 and 1982 in Belfast, Northern Ireland.
 It was based in the Shankill area and was responsible for the deaths of at least 23 people, most of whom were killed in sectarian attacks.
 The gang was notorious for kidnapping and murdering random Catholic and suspected Catholic civilians; each was beaten ferociously and had his throat hacked with a butcher's knife.
 Some were also tortured and attacked with a hatchet.
 The gang also killed six Ulster Protestants over personal disputes, and two other Protestants mistaken for Catholics.
 Most of the gang were eventually caught and, in February 1979, received the longest combined prison sentences in United Kingdom legal history.
 However, gang leader Lenny Murphy and his two chief "lieutenants" escaped prosecution.
 Murphy was killed in November 1982 by the Provisional IRA, likely acting with loyalist paramilitaries who perceived him as a threat.
 The Butchers brought a new level of paramilitary violence to a country already hardened by death and destruction.
 The judge who oversaw the 1979 trial described their crimes as "a lasting monument to blind sectarian bigotry".
Michael Stone (born 2 April 1955) is an Ulster loyalist who was a volunteer in the Ulster Defence Association (UDA).
 Stone was born in England but raised in the Braniel estate in East Belfast, Northern Ireland.
 Convicted of murdering three people and injuring more than 60 in an attack on mourners at Milltown Cemetery in 1988, he was sentenced to life imprisonment.
 While in jail, he became one of the leaders of the Ulster Defence Association/Ulster Freedom Fighters (UDA/UFF) prisoners.
The Red Hand Defenders (RHD) is an Ulster loyalist paramilitary group in Northern Ireland.
 It was formed in 1998 by loyalists who opposed the Belfast Agreement and the loyalist ceasefires. Its members were drawn mostly from the Ulster Defence Association (UDA) and Loyalist Volunteer Force (LVF).
 The name had first been used by Red Hand Commandos dissident Frankie Curry in 1996 and he was the leading figure in what was a somewhat unstructured organization until he was killed in 1999.
 It is named after the Red Hand of Ulster.
The Ulster Defence Association (abbreviated UDA) is the largest Ulster loyalist paramilitary and vigilante group in Northern Ireland.
 It was formed in September 1971 and undertook a campaign of almost twenty-four years during the Troubles.
 For most of this time it was a legal organisation.
 Its declared goal was to defend Ulster Protestant loyalist areas and to combat Irish republicanism, particularly the Provisional Irish Republican Army (IRA).
 In the 1970s, uniformed UDA members openly patrolled these areas armed with batons and held large marches and rallies.
 Within the UDA was a group tasked with launching paramilitary attacks; it used the covername Ulster Freedom Fighters (UFF) so that the UDA would not be outlawed.
 The British government outlawed the "UFF" in November 1973, but the UDA itself was not proscribed as a terrorist group until August 1992.
British Army corporals David Howes and Derek Wood were killed by the Provisional IRA on 19 March 1988 in Belfast, Northern Ireland, in an event which became known as the corporals killings.
 The off-duty soldiers were wearing plain-clothes when they were killed by the IRA after encountering the funeral procession of an IRA member whilst returning from Belfast to Lisburn.
 Three days before, loyalist paramilitary Michael Stone had attacked an IRA funeral and killed three people.
 Believing the soldiers were loyalists intent on repeating Stone's attack, dozens of people surrounded and attacked their car.
 During this, Corporal Wood drew his service pistol and fired a shot in the air.
 The soldiers were then dragged from the car, beaten, and taken to nearby waste ground where they were stripped and shot dead.
The Milltown Cemetery attack (also known as the Milltown Cemetery killings or Milltown Massacre) took place on 16 March 1988 in Belfast's Milltown Cemetery.
 During the funeral of three Provisional IRA volunteers killed in Gibraltar, an Ulster Defence Association (UDA) volunteer, Michael Stone, attacked the mourners with hand grenades and pistols.
 As Stone then ran towards the nearby motorway, a large crowd began chasing him and he continued shooting and throwing grenades.
 Some of them caught him and began beating him, but he was rescued by the police and arrested.
 Three people had been killed and more than 60 wounded.
 The "unprecedented, one-man attack" was filmed by television news crews and caused shock around the world.
A total of eleven people were killed in violence relating to the Northern Irish Troubles in the town of Magherafelt, County Londonderry.
 Nine were killed by the Irish Republican Army (IRA), including three IRA members killed by the premature explosion of their own bomb while travelling through Magherafelt.
 One was killed by a non-specific republican group and another by the opposing Ulster Freedom Fighters (UFF).
 Of the others killed by the IRA, four were Protestant civilians.
 Three of them were killed in two separate car bomb explosions.
 The fourth Protestant civilian was shot because his firm was a contractor for the British Army and the Royal Ulster Constabulary (RUC).
 The IRA's other two victims were both Protestant members of the security forces, one from the RUC and the other from the Ulster Defence Regiment.
 Both were off duty when killed.
 The man killed by the UFF was a Sinn Féin councillor who was shot in his workplace.
 The man killed by the non-specific republican group was a Catholic civilian.
The Red Hand Commando (RHC) is a small secretive Ulster loyalist paramilitary group in Northern Ireland, which is closely linked to the Ulster Volunteer Force (UVF).
 Its aim was to combat Irish republicanism – particularly the Irish Republican Army (IRA) – and to maintain Northern Ireland's status as part of the United Kingdom.
 The Red Hand Commando has killed 13 people during The Troubles, 12 civilians and one of its own members.
 It is named after the Red Hand of Ulster.
The Loyalist Volunteer Force (LVF) is a small Ulster loyalist paramilitary group in Northern Ireland.
 It was formed by Billy Wright in 1996 when he and his unit split from the Ulster Volunteer Force (UVF) after breaking its ceasefire.
 They had belonged to the UVF's Mid-Ulster Brigade and Wright had been the brigade's commander.
 In a two-year period from August 1996, the LVF waged a paramilitary campaign with the stated goal of combatting Irish republicanism.
 During this time it killed at least 14 people in gun and bomb attacks.
 Almost all of its victims were Catholic civilians who were killed at random.
 The LVF called off its campaign in August 1998 and decommissioned some of its weapons, but in the early 2000s a loyalist feud led to a number of killings.
 Since then, the LVF has been largely inactive, but its members are believed to have been involved in rioting and organized crime.
 In 2015, the security forces stated that the LVF "exists only as a criminal group" in Mid-Ulster and Antrim.

Question: When was the Ulster loyalist who attacked an IRA funeral and killed three people born? 
Answer: 2 April 1955