Question: When was the date of the Battle of the Beanfield?
About the article "Stonehenge", section "Neopaganism".

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The ensuing confrontation with police ended in the Battle of the Beanfield, and no free festival has been held at Stonehenge since, although people have been allowed to gather at the stones again for the solstice since 1999. 
The Battle of the Beanfield took place over several hours on the afternoon of Saturday 1 June 1985, when Wiltshire Police prevented a convoy of several hundred New Age travellers (known as "The Convoy") from setting up at what would have been the 11th Stonehenge Free Festival in Wiltshire, England.
The incident resulted from a local branch of the English Heritage society, then custodians of the site, concerned about new age travellers, persuading the High Court to grant an exclusion zone of four miles around the stones.
The incident is notorious, in the context of mid-1980s social unrest in England, as an example of police violence.
Convoy members testified, and video evidence supports, that after a stand-off lasting several hours, members of the police attacked the procession by forcefully entering the field in which the vehicles were contained, methodically smashed windows, beat people about the head with truncheons, used sledgehammers to break and damage the interiors of their vehicles and arrested the convoy members.
The accounts were supported by independent witnesses and upheld by subsequent court verdicts.
The Beanfield was the field neighbouring the vehicles' location.
When a large number of police entered the first field many of the convoy vehicles attempted to escape by breaking through the Beanfield, but most were pursued and arrested.
The police alleged that they retaliated after they had come under attack, being pelted with lumps of wood, stones and even petrol bombs.
They did not repeat these allegations in any of the subsequent court cases and no proof for them has ever come to light.
Whilst the full account of events remains in dispute, a court judgment six years later found the police guilty of wrongful arrest, assault and criminal damage. 
The Levellers' song "Battle of the Beanfield", from their 1991 album "Levelling the Land", was inspired by the Battle of the Beanfield.
The song "Itinerant Child", by Ian Dury and Chaz Jankel, which appears on the 1998 album "Mr. Love Pants", by Ian Dury & The Blockheads, was inspired by Dury's experiences during the incident.
British progressive-rock band Solstice wrote a song which comments on the Battle.
"Circles" is found on their 1997 album of the same name, and includes what sounds like reporting from the battle, with Kim Sabido's voice-over.
Flicknife Records released an album 'Travellers Aid Trust'(SHARP2045) featuring Hawkwind, Ozric Tentacles, Agent Of Chaos,Culture Shock, etc in order to raise money to equip 2 buses as schools for the travellers'children and c/o The Travellers Aid Trust Organisation (http://travellersaidtrust.org) 
Migration is an album by American pianist Dave Grusin released in 1989, recorded for the GRP label.
The album reached #1 on "Billboard"'s Contemporary Jazz chart.
The Suite from the Milagro Beanfield War (tracks 10-14) received the 1990 Grammy Award for Best Arrangement of an Instrumental.
Grusin's music from The Milagro Beanfield War was also a 1988 Academy Award winner, and a 1988 Golden Globe nominee for Best Original Score. 
 "Not to be confused with John Nichols (writer), the author of "The Milagro Beanfield War", who is sometimes credited as John Treadwell Nichols" John Treadwell Nichols (June 11, 1883 – November 10, 1958) was an American ichthyologist.