The dates given in the blog are based on the calendar from the Forgotten Realms. Hammer is thus comparable to January, Alturiak February, and so on.

Month Name Common name
1 Hammer Deepwinter
2 Alturiak The Claw of Winter
3 Ches The Claw of the Sunsets
4 Tarsakh The Claw of the Storms
5 Mirtul The Melting
6 Kythorn The Time of Flowers
7 Flamerule Summertide
8 Eleasis Highsun
9 Eleint The Fading
10 Marpenoth Leaffall
11 Uktar The Rotting
12 Nightal The Drawing Down