What year did john napier invent logarithms to help reduce errors when performing calculations?

John Napier invented logarithms in the early 17th century, with his work published in 1614 in the book "Mirifici Logarithmorum Canonis Descriptio." His invention was designed to simplify calculations, particularly in astronomy and navigation, by transforming multiplication and division into addition and subtraction. This significantly reduced the potential for errors in calculations at the time.