The calendar is covered in 'Neath the Shadow #3, the magazine for TAoS. Nowhere are the days of the week seems to be named, though I'm sure I could come up with something, but the 12 months are as followed:
Enc-Ithron, translation: "slow moon", 30 days, roughly the equivalent of the month of Novembre.
Nan-Denyr, translation: "long nights", 31 days, roughly the equivalent of the month of Decembre.
Daur-Ithron, translation: "bleak moon", 30 days, roughly the equivalent of the month of January.
Elith-Erain, translation: "silver days", 30 days, roughly the equivalent of the month of February.
Elith-Denyr, translation: "silver nights", 31 days, roughly the equivalent of the month March.
Nos-Melen, translation: "rain end", 30 days, roughly the equivalent of the month of April.
Breth-Ithron, translation: "fleet moon", 30 days, roughly the equivalent of May.
Teth-Denyr, translation: "short nights", 31 days, roughly the equivalent of the month of June.
Gad-Ithron, translation: "bright moon", 30 days, roughly the equivalent of the month of July.
Mal-Erain, translation: "gold days", 30 days, roughly the equivalent of the month of August.
Mal-Denyr, translation: "gold nights", 31 days, roughly the equivalent of the month of Septembre.
Nos-Heran, translation: "rain start", 30 days, roughly the equivalent of the month of Octobre.