Calendar of Harptos - Forgotten Realms

There are 365 days in the year, split up into twelve months of thirty days each with five holidays that fall between some months. The names of the months are given in both the formal names and the common ones. The seasons run like they do for us; Hammer is like January and Flamerule is like July. Each week consists of ten days, called tendays.

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 Elesias Highsun
9 Eleint The Fading
10 Marpenoth Leaffall
11 Uktar The Rotting
12 Nightal The Drawing Down

The holidays are Midwinter, Greengrass, Midsummer, Highharvestide and The Feast of the Moon. Midwinter falls between Hammer and Alturiak, Greengrass between Tarsakh and Mirtul, Midsummer is between Flamerule and Eleasis, Highharvestide is between Elient and Marpenoth, and The Feast of the Moon is between Uktar and Nightal.

Every four years, another holiday called Shieldmeet is added as a leap day immediately following the Midsummer holiday.