Table of Contents
Calendar of Harptos
The Calendar of Harptos is the calendar used across most of Faerûn. It was created by the wizard Harptos of Kaalinth, although most people associate the word “Harptos” with the calendar.
It is split into twelve months, each lasting three tendays (or thirty days). There are an additional five days that fall between months, bringing the total number of days in most years to 365.
The Phases of Selûne
The moon, Selûne, has a cycle that is roughly 30 days long. On the first of each month, or the preceding holiday, it is a Full Moon.
See this Moon Phase Calendar for more details.
Months and Festivals
The names of the months and festivals used in Faerûn are as follows:
1 - Hammer (“Deepwinter”) - Midwinter between Hammer 30 and Alturiak 1
2 - Alturiak (pronounced: /ɔːlˈtɜːriæk/ awl-TUR-ee-æk, “The Claw of Winter” or “The Claws of the Cold”)
3 - Ches (“The Claw of Sunsets”) - - Spring Equinox on Ches 19 (in Waterdeep celebrated as Fey Day)
4 - Tarsakh (pronounced: /ˈtɑːrsæk/ TAR-sæk, “The Claw of Storms”) - Greengrass between Tarsakh 30 and Mirtul 1
5 - Mirtul (pronounced: /ˈmɜːrtəl/ MUR-tuhl, “The Melting”)
6 - Kythorn (pronounced: /ˈkaɪθɔːrn/ KIGH-thorn, “The Time of Flowers”) - Summer Solstice on Kythorn 20 (in Waterdeep celebrated as Dragondown)
7 - Flamerule (pronounced: /ˈfleɪmruːl/ FLAYM-rool, “Summertide”) - Midsummer between Flamerule 30 and Eleasis 1 - Shieldmeet occurs the day after Midsummer, once every four years
8 - Eleasis (pronounced: /ɛˈlisɪs/ eh-LEE-sis, “Highsun”)
9 - Eleint (pronounced: /ɛˈleɪnt/ eh-LAYNT, “The Fading”) - Autumn Equinox on Eleint 21 (in Waterdeep celebrated as Brightswords) - Highharvestide between Eleint 30 and Marpenoth 1
10 - Marpenoth (“Leaffall”)
11 - Uktar (“The Rotting”) - Feast of the Moon between Uktar 30 and Nightal 1
12 - Nightal (“The Drawing Down”) - Winter Solstice on Nightal 20 (in Waterdeep celebrated as Simril)
Waterdeep Celebrations
In addition to these, Waterdeep has a lot of local celebrations.