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.

Unless otherwise indicated, for events in England, the date given is Old Style, 10 days behind the Dutch Republic's New Style until 1700 and then 11 days behind.

Date
May 18, 1695 Wrote Letter 89 of 1695-05-18 (AB 144) to Frederik Adriaan van Reede van Renswoude
May 21, 1695 Wrote letter of 1695-05-21 (AB 145) to Pieter Rabus
May 23, 1695 Wrote letter of 1695-05-23 (AB 146) to Maarten Etienne van Velden
July 8, 1695 Christiaan Huygens died
July 10, 1695 Wrote Letter 90 of 1695-07-10 (AB 147) to Frederik Adriaan van Reede van Renswoude
July 12, 1695 Wrote letter of 1695-07-12 (AB 148) to Maarten Etienne van Velden
July 20, 1695 Wrote Letter 91 of 1695-07-20 (AB 149) to Anthonie Heinsius
July 21, 1695 Wrote letter of 1695-07-21 (AB 150) to Pieter Rabus
August 1, 1695 Visited by Johann Wilhelm von Pfalz-Neuburg, Elector Palatine, his wife and his mother
August 15, 1695 Wrote Letter 92 of 1695-08-15 (AB 151) to Frederik Adriaan van Reede van Renswoude
August 15, 1695 Wrote letter of 1695-08-15 (AB 152) to Antonio Magliabechi
August 16, 1695 Wrote letter of 1695-08-16 (AB 153) to Antonio Magliabechi
August 18, 1695 Wrote Letter 93 of 1695-08-18 (AB 154) to Anthonie Heinsius
August 20, 1695 Wrote Letter 94 of 1695-08-20 (AB 155) to Frederik Adriaan van Reede van Renswoude
September 10, 1695 Wrote letter of 1695-09-10 (AB 156) to Pieter Rabus
September 18, 1695 Wrote Letter 95 of 1695-09-18 (AB 157) to Johann Wilhelm von Pfalz-Neuburg
October 18, 1695 Wrote letter of 1695-10-18 (AB 158) to Antonio Magliabechi
October 31, 1695 Wrote letter of 1695-10-31 (AB 159) to Antonio Magliabechi
November 3, 1695 Wrote Letter 96 of 1695-11-03 (AB 160) to Johann Wilhelm von Pfalz-Neuburg
December 1, 1695 Wrote letter of 1695-12-01 (AB 161) to Frederik Adriaan van Reede van Renswoude
December 14, 1695 Received an honorarium from the city for the Fifth Continuation of the Letters
December 22, 1695 Wrote letter of 1695-12-22 (AB 162) to Antonio Magliabechi
December 28, 1695 Wrote Letter 97 of 1695-12-28 (AB 163) to Hendrik van Bleyswijk
January 1, 1696 Published Sout-figuren (Salt figures), Letters 44, 45 (2nd)
January 1, 1696 Published Levende Dierkens (Living Animals), Letters 28 - 31, 34 - 36 (2nd)
January 1, 1696 Published Continuatio Epistolarum (Continuation of the Letters), Letters 53-60 (2nd)
January 1, 1696 Published Arcana Naturae Microscopiorum (Nature's Mcroscopical Mysteries), 19 Letters from 28 - 52 (2nd)
January 1, 1696 Published Vijfde Vervolg der Brieven (Fifth Continuation of the Letters), Letters 84 - 96
January 1, 1696 Published Antony van Leeuwenhoeks 40ste Missive, Geschreven aan (Written to) de Heer Francois Aston
January 1, 1696 Published Antony van Leeuwenhoeks 37ste Missive, Geschreven aan (Written to) de Heer Cristopher Wren
February 20, 1696 Wrote Letter 98 of 1696-02-20 (AB 164) to Frederik Adriaan van Reede van Renswoude
March 8, 1696 Wrote Letter 99 of 1696-03-08 (AB 165) to Nicolaas Witsen
May 16, 1696 Pieter Rabus wrote to Leeuwenhoek about dowsing rods
June 1, 1696 Wrote letter of 1696-06-01 (AB 166) to Pieter Rabus
July 6, 1696 Wrote Letter 100 of 1696-07-06 (AB 167) to Nicolaas Witsen
July 10, 1696 Wrote Letter 102 of 1696-07-10 (AB 169) to Members of the Royal Society
July 10, 1696 Wrote Letter 101 of 1696-07-10 (AB 168) to Nicolaas Witsen
July 16, 1696 Wrote Letter 103 of 1696-07-16 (AB 170) to Frederik Adriaan van Reede van Renswoude
July 23, 1696 Wrote letter of 1696-07-23 (AB 171) to Pieter Rabus
July 30, 1696 Pieter Rabus wrote to Leeuwenhoek more about dowsing rods
August 26, 1696 Wrote Letter 104 of 1696-08-26 (AB 172) to Frederik Adriaan van Reede van Renswoude
August 28, 1696 Wrote letter of 1696-08-28 (AB 173) to Antonio Magliabechi
August 29, 1696 Wrote Letter 105 of 1696-08-29 (AB 174) to Hendrik van Bleyswijk
September 7, 1696 Wrote letter of 1696-09-07 (AB 175) to Antonio Magliabechi
September 12, 1696 Wrote Letter 106 of 1696-09-12 (AB 176) to Anthonie Heinsius
September 27, 1696 Wrote Letter 107 of 1696-09-27 (AB 177) to Hendrik van Bleyswijk
October 26, 1696 Wrote letter of 1696-10-26 (AB 178) to Maarten Etienne van Velden
October 30, 1696 Wrote letter of 1696-10-30 (AB 179) to N.N.
November 1, 1696 Wrote letter of 1696-11-01 (AB 180) to Harmen van Zoelen
November 6, 1696 Received an honorarium from the city for the Sixth Continuation of the Letters
January 1, 1697 Published Sesde Vervolg der Brieven (Sixth Continuation of the Letters), Letters 97 - 107
January 1, 1697 Published Zaden van Boomen (Seeds of Trees), Letters 46, 47 (2nd)
January 1, 1697 Published Tweede Vervolg der Brieven (Second Continuation of the Letters), Letters 61 - 67 (2nd)
January 1, 1697 Published Continuatio Arcanorum Naturae detectorum (Continuation of Nature's Mysteries Disclosed), Letters 93 - 107
February 12, 1697 Wrote letter of 1697-02-12 (AB 181) to Maarten Etienne van Velden
February 19, 1697 Wrote letter of 1697-02-19 (AB 182) to Hans Sloane
March 25, 1697 Wrote letter of 1697-03-25 (AB 183) to Members of the Royal Society
April 5, 1697 Wrote Letter 108 of 1697-04-05 (AB 184) to Members of the Royal Society
June 1, 1697 Visited by Sir Francis Child
June 6, 1697 Wrote letter of 1697-06-06 (AB 185) to Antonio Magliabechi
July 1, 1697 Wrote letter of 1697-07-01 (AB 186) to N.N.
September 3, 1697 Wrote Letter 109 of 1697-09-03 (AB 187) to Jan van Leeuwen
September 3, 1697 Visited neice Rijcke van Leeuwen in Rotterdam
September 10, 1697 Wrote Letter 110 of 1697-09-10 (AB 188) to Members of the Royal Society
October 12, 1697 cousin Jannetje Maertens (Johanna) Leeuwenhoek married Frans van Trigt
November 2, 1697 Wrote letter of 1697-11-02 (AB 189) to Antonio Magliabechi
December 1, 1697 Wrote letter of 1697-12-01 (AB 190) to N.N.
December 10, 1697 aunt Anna Verloo left coins to Maria Thonis and her cousin Magdaleentje
January 1, 1698 Published Onsigtbare Verborgentheden (Invisible Mysteries), Letters 38, 42, 43 (3rd)
January 1, 1698 Published A. van Leeuwenhoeks 41ste Missive, Geschreven aen (written to) de Koninklijke Societeit tot Londen

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