| Month | Subject | Author | Remark | |
| 09-01 | Old Roman sundial | Fer de Vries | ||
| 09-02 | Clock with equation-of-time dial | Fer de Vries | ||
| 09-03 | Planetary hours | Fer de Vries | Finds by Nicola Severino | |
| 09-04 | Universal bifilar sundial | Fer de Vries | ||
| 09-05 | The sailing wooden shoe by Jan Kragten | Fer de Vries | ||
| 09-06 | Oughtred sundial is older than Oughtred? | Fer de Vries | ||
| 09-07 | Hourplane sundial | Fer de Vries | ||
| 09-08 | Vertical sundial | Fer de Vries | Decimal hours | |
| 09-09 | Azimuth sundial | Fer de Vries | Seesaw Sundial | |
| 09-10 | Penny sundial | Fer de Vries | ||
| 09-11 | Trifilar sundial | Fer de Vries | Design: Bernard Rouxel, France | |
| 09-12 | Clock and sundial | Fer de Vries |