The words we have in Dovahzul stand for both real-world days and months, and those in Skyrim. The months are:
Feylil - January / Morning Star
Kreinvu - February / Sun's Dawn
Diistmaas - March / First Seed
Haalokluv - April / Rain's Hand
Ziistmaas - May / Second Seed
Mitheruvos - June / Mid-Year
Shulnaar - July / Sun's Height
Laatmaas - August / Last Seed
Silyol - September / Heartfire
Fomah - October / Frostfall
Kreintor - November / Sun's Dusk
Vulonfil - December / Evening Star
The days are:
Iilahsul - Monday / Morndas
Vusul - Tuesday / Tirdas
Wuthsul - Wednesday / Middas
Torsul - Thursday / Turdas
Vensul - Friday / Fredas
Strunsul - Saturday / Loredas
Filsul - Sunday / Sundas