In a speech on 24 November 1992, to mark the 40th anniversary of her accession, Elizabeth called 1992 her annus horribilis, meaning horrible year. In March, her second son, Prince Andrew, Duke of York, and his wife, Sarah, separated; in April, her daughter, Princess Anne, divorced Captain Mark Phillips; during a state visit to Germany in October, angry demonstrators in Dresden threw eggs at her; and, in November, a large fire broke out at Windsor Castle, one of her official residences. The monarchy came under increased criticism and public scrutiny. In an unusually personal speech, the Queen said that any institution must expect criticism, but suggested it be done with "a touch of humour, gentleness and understanding". Two days later, the Prime Minister, John Major, announced reforms to the royal finances planned since the previous year, including the Queen paying income tax from 1993 onwards, and a reduction in the civil list. In December, Prince Charles and his wife, Diana, formally separated. The year ended with a lawsuit as the Queen sued The Sun newspaper for breach of copyright when it published the text of her annual Christmas message two days before it was broadcast. The newspaper was forced to pay her legal fees and donated £200,000 to charity.
Try to answer this question if possible (otherwise reply "unanswerable"): What did Elizabeth's speech on 24 November, 1992 mark?
her accession