Short answers, pulled from the story.
The Tolkien Society's informal beginning is dated to Thursday the 6th of November 1969, when Vera Chapman's column in the New Statesman invited readers to write to an address in London. The society held its inaugural meeting on the 29th of January 1970 and became a legal entity on the 15th of January 1972.
Vera Chapman founded the Tolkien Society, announcing it under the pseudonym Belladonna Took in both the fanzine The Middle Earthworm and a personal column in the New Statesman in November 1969. She also made first contact with J. R. R. Tolkien on the society's behalf, writing to him on the 1st of May 1970.
Tolkien agreed to become the society's honorary president at a sherry party hosted by his publishers, Allen and Unwin, on the 27th of June 1972. After his death, his son Christopher Tolkien suggested that his father remain president in perpetuity, an arrangement approved at the 1974 Annual General Meeting.
Oxonmoot is the Tolkien Society's largest annual event, a conference and convention held in an Oxford college near Hobbit Day on the 22nd of September. The first Oxonmoot took place at The Welsh Pony on George Street, Oxford, between the 13th and the 15th of September 1974, following a suggestion made in the fanzine Nazgul in December 1973.
The Tolkien Society publishes the bulletin Amon Hen six times a year and the peer-reviewed journal Mallorn once a year. Its affiliated Cambridge smial publishes the open-access journal Anor, and the Peter Roe book series prints seminar proceedings on an irregular basis.
Tolkien Reading Day is held on the 25th of March, marking the date of the downfall of Sauron in Tolkien's chronology. The idea was proposed by journalist Sean Kirst of the Post-Standard in Syracuse, New York, in 2002, and the first Tolkien Reading Day took place on the 25th of March 2003.