| Month of the year | Labelled on astrolabe |
|---|---|
| 1. January : | Janua |
| 2. February : | Febru |
| 3. March : | Marti9 |
| 4. April : | Aprilis |
| 5. May : | Maiu |
| 6. June : | Juni |
| 7. July : | Juli9 |
| 8. August: | Augus |
| 9. September : | Septem |
| 10. October : | Octo |
| 11. November : | Novem |
| 12. December : | Decem |
The calendar is of the Western type. The months are numbered
every ten days from the first or second of the month.The
vernal equinox falls on the 21th day of March. [N.B: Date is
decimal as date of vernal equinox on some astrolabes can be
measured to within 0.25 of a day]The scale is marked at
irregular days
The calendar is labelled: