| Month of the year | Labelled on astrolabe |
|---|---|
| 1. January : | INAVARIVS |
| 2. February : | FEBRVARI9 |
| 3. March : | MARTIVS |
| 4. April : | APRILIS |
| 5. May : | MAIVS |
| 6. June : | IVNIVS |
| 7. July : | IVLIVS |
| 8. August: | AVGVSTVS |
| 9. September : | SPETEMB[ER] |
| 10. October : | OCTOBER |
| 11. November : | NOVEMBER |
| 12. December : | DECEMBER |
The calendar is of the Western type. Every fifth day and the
end of the month. Note that December has 31 1/4 days as do a
number of other instruments in this collection..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: