Calendar of Harptos

The Calendar of Harptos is the calendar used across most of Faerûn, created by the wizard Harptos of Kaalinth. It splits the calendar into 12 months, each made of three tendays, for a total of thirty days. There are also five days that lie outside of a month, for a total of 365 days per year. And yes, the Harptos calendar also allows for leap years.

Months and Festivals

1. Hammer
   1. Midwinter falls between Hammer 30 and Alturiak 1
2. Alturiak
3. Ches (Spring Equinox is on Ches 19)
4. Tarsakh
   1. Greengrass falls between Tarsakh 30 and Mirtul 1
5. Mirtul
6. Kythorn (Summer Solstice is on Kythorn 20)
7. Flamerule
   1. Midsummer falls between Flamerule 30 and Eleasis 1
   2. Every four years, Shieldmeet occurs the day after Midsummer
8. Eleasis
9. Eleint (Autumn Equinox is on Eleint 21)
   1. Highharvestide falls between Eleint 30 and Marpenoth 1
10. Marpenoth
11. Uktar
    1. Feast of the Moon falls between Uktar 30 and Nightal 1
12. Nightal (Winter Solstice is on Nightal 20)