| Month | Subject | Author | Remark | |
| 03-01 | Analemmatic sundial with hourlines |
Fer de Vries | Source: Mac Ogelsby USA |
|
| 03-02 | How much time is sundial time? |
Fer de Vries | ||
| 03-03 | Groningen Prinsenhof (Prince's Court) Sundial plans of 1730 found |
Fer de Vries | See also sundial of the month march |
|
| 03-04 | What are all these bands called? | Fer de Vries | Names armillary dial | |
| 03-05 | At what time is the sun due South (North)? |
Fer de Vries | ||
| 03-06 | How do we count the hours? | Fer de Vries | ||
| 03-07 | Analemma, the terrible word |
Hans de Rijk | ||
| 03-08 | A wide style triangle | Fer de Vries | ||
| 03-09 | A note about bifilar sundials with negative wires. |
Fer de Vries | Idea: Fabio Savian Italy |
|
| 03-10 | Shadow sundial | Fer de Vries | Idea: Hans de Rijk | |
| 03-11 | Terminology gnomon | Fer de Vries | ||
| 03-12 | Style height | Fer de Vries | ||