| Month of the year | Labelled on astrolabe |
|---|---|
| 1. January : | Ian |
| 2. February : | Febr |
| 3. March : | Mar |
| 4. April : | Apr |
| 5. May : | May |
| 6. June : | I |
| 7. July : | Iuly |
| 8. August: | Aug |
| 9. September : | Sept |
| 10. October : | Oct |
| 11. November : | Nou |
| 12. December : | D |
The calendar is of the Western type. The vernal equinox falls
on the 9th 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 calendar is divided into halves on each
side of the projection
The calendar is labelled: