An almanac released by Isaac Bickerstaff in February 1708 predicted that a rival astrologer, John Partridge, would die on March 29 of that year. On March 31st Bickerstaff released a follow-up pamphlet announcing that his prediction had come true. Partridge was dead. However, Partridge was actually still very much alive. He was woken on April 1st by a sexton outside his window announcing the news of his death. Isaac Bickerstaff was actually a pseudonym for Jonathan Swift, whose intention was to embarrass and discredit Partridge, because he was annoyed by the astrologer’s attacks upon the church.
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The Hoaxes of Jonathan Swift