| Month | Place | Type | Author | Remark |
| 05-01 | Ootmarsum | Sundial as pocket watch | Bote Holman | Museum Chronomium |
| 05-02 | Tiel | Hour plane sundial | Fer de Vries | |
| 05-03 | Louvre, Paris | Oil painting | Fer de Vries | Vanité au Cadran Solaire |
| 05-04 | IJsselstein | North west dial | Fer de Vries | |
| 05-05 | Amsterdam Nieuwe Kerk |
Vertical sundials | Fer de Vries | One dial is a triple dial |
| 05-06 | Ootmarsum | Cylinder sundial | Fer de Vries | Sign of Scorpio |
| 05-07 | Otos, Spain | Moving sundial | Fer de Vries | |
| 05-08 | Goes, Zeeland | Grand piano and violin | Fer de Vries | |
| 05-09 | Divers | Undials | Gerrit Sasbrink | |
| 05-10 | Open armillary sphere | Fer de Vries | ||
| 05-11 | Middelburg | Vertical siundial | Fer de Vries | Equation of time in 1682? |
| 05-12 | Deventer | Analemmatic siundial | Fer de Vries | |