| Month of the year | Labelled on astrolabe |
|---|---|
| 1. January : | IANVARIVS |
| 2. February : | FEBRVARI9 |
| 3. March : | MARCIVS |
| 4. April : | APRILIS |
| 5. May : | MAIVS |
| 6. June : | IVNIVS |
| 7. July : | IVLIVS |
| 8. August: | AVGVST9 |
| 9. September : | SEPTEMBER |
| 10. October : | OCTOBER |
| 11. November : | NOVEMBER |
| 12. December : | DECEMBER |
The calendar is of the Western type. Every tenth day and the
last day of the month. Note, the last day of December was
initially numbered 30 and later corrected to 31.The vernal
equinox falls on the 10th 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 labelled: