Kethira is the name of the planet that Hârn is on.

In the Kethira module, details such as the planet's year (revolution) and day (rotation) are given for all the planets in the system along with other technical details. The year on Kethira is 360 days, and the day is 24 hours. These are earthlike on purpose - a deliberate design decision so that assumptions can be made when playing.


Drilling down to the globe of Kethira, information is provided about the planet's plate tectonics, global ocean currents, winds, and natural vegetation.

The island of Hârn lies off the continent of Lythia which is roughly Asiatic in size and scope. Hârn is loosely analogous to England allowing more assumptions/familiarity with weather and geography (these were also design decisions).

Time-wise, Hârn is comparable to 11th and 12th century Norman England. However, the island is home to a variety of cultures, all written with plausible histories and intricate current events. The addition of elements of fantasy with believable limits and controls allows gamers to experience almost any type of medieval roleplaying using some aspects of HârnWorld.

Read about Kethira, Lythia, and more in the HârnDex.

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