Chronology of events:

For some events, the year is certain but the month and day are not. Example: We know only the year for the collections of Leeuwenhoek's letters published in Dutch during his lifetime. For other events, the season or month are certain but the day is not. Example: Leeuwenhoek mentions that someone visited him "last month".

On the other hand, many events did indeed happen on the first day of a month. Example: public appointments to Delft's city offices took effect on January 1 of each year. Thus:

  • A date of January 1 in a given year may indicate that the year is certain but the month and day are not.
  • A date of 1 in a given month may indicate that the year and month are certain but the day is not.
Date
December 23, 1717 Named again as neighbor in the disposition of Pieter van der Wilt's estate
January 1, 1718 Published Send-Brieven (Epistles), Letters I - XLVI
April 1, 1718 cousin Pieter Maartens Leeuwenhoek married Kniertje van der Doe
April 19, 1718 nephew Adriaan Johannes Swalmius married Elisabet van Heering
December 6, 1718 Named again as a neighbor in final sale of Pieter van der Wilt's property
December 30, 1718 Delft's mayors decided that the kamerbewaarder would no longer receive 300 g after the death of Leeuwenhoek
January 1, 1719 Published Epistolae ad Societatem (Letters to the Society), Letters 108 - 146
January 1, 1719 Published Epistolae Physiologicae (Physiological Letters), Letters I - XLVI
January 23, 1719 Received payment from the city for inspector / wine gauger duties
June 26, 1719 Made will with daughter Maria
April 8, 1720 cousin Magdaleentje (Helena) Maertens Leeuwenhoek buried
April 29, 1720 Received payment from the city for inspector / wine gauger duties
December 30, 1720 cousin Maarten Pieters Hogenhouck buried
May 1, 1721 At age 88, his 100th publication in Philosophical Transactions
November 17, 1721 Made will with daughter Maria
November 26, 1721 Amended will of November 17
November 30, 1721 Presented will of November 17 to notary Jan de Bries
December 19, 1721 grand-nephew Jan Cornelis Haaxman buried
January 1, 1722 Published Arcana Naturae Detecta (Nature's Mysteries Disclosed), Letters 32, 33, 37, 39 - 41, 61 - 92 (2nd)
January 1, 1722 Published Continuatio Arcanorum Naturae detectorum (Continuation of Nature's Mysteries Disclosed), Letters 93 - 107 (2nd)
January 1, 1722 Published Opera Omnia, seu Arcana Naturae Microscopiorum (The Works, or Nature's Microscopical Mysteries), 25 Letters from 28 - 60 (4th)
May 15, 1722 Received payment from the city for inspector / wine gauger duties
July 13, 1722 Received payment from the city for inspector / wine gauger duties
August 25, 1723 Requested on his deathbed that Hoogvliet translate his final two letters into Latin
August 26, 1723 Died in his Hippolytusbuurt home, 90 years old
August 30, 1723 pastor Petrus Gribius wrote to James Jurin of the Royal Society announcing Leeuwenhoek's death
August 31, 1723 Buried in Oude Kerk
October 4, 1723 pastor Petrus Gribius wrote to James Jurin of the Royal Society about Leeuwenhoek's methods
October 4, 1723 daughter Maria sent cabinet with 26 magnifying glasses to the Royal Society
November 2, 1723 translator John Chamberlayne died
January 1, 1724 Martin Folkes' article about Leeuwenhoek's microscopes published in Philosophical Transactions
January 1, 1729 Reinier Boitet's Beschryving der Stadt Delft published; first biography of Leeuwenhoek
April 16, 1729 nephew Anthonij Jans de Molijn buried
January 1, 1730 Published Continuatio Epistolarum (Continuation of the Letters), Letters 53-60 (4th)
February 21, 1730 cousin Adriaen Lambrechts Leeuwenhoek, the notary, had his license suspended by the Heren van de Weth
August 7, 1732 daughter Maria added codicil to 1721 will
November 14, 1739 daughter Maria funded the Oude Kerk memorial for her father
June 24, 1741 daughter Maria made a will providing for the graves
May 20, 1744 daughter Maria made her final will
April 25, 1745 daughter Maria died
April 30, 1745 daughter Maria buried
June 26, 1745 daughter Maria's estate inventoried
August 23, 1745 house on Hippolytusbuurt, het Gulden Hoofd, offered for sale
August 25, 1745 house on Hippolytusbuurt, het Gulden Hoofd, sold to great-nephew Dirk Haaxman
September 25, 1745 daughter Maria's 1744 act of guardianship presented to Weeskamer
September 15, 1746 daughter Maria's estate distributed to her heirs
May 23, 1747 auction of the books and instruments of a "Liefhebber"
May 29, 1747 Leeuwenhoek's magnifying glasses auctioned
August 14, 1755 niece Margareta Cornelia Hobus's estate
December 1, 1755 Josina van der Sprenkel sold the house on the Oosteinde that daughter Maria had bequeathed her
October 17, 1763 niece Maria's granddaughter Maria Jans Haaxman divorced from Steven Bolland
December 14, 1765 great-nephew Dirk Haaxman sold the Gulden Hoofd
September 23, 1776 daughter Maria, final accounting of her estate

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