Days, nights and years are on a similar scale to Earth's. However, the planet orbits a binary system, the two suns being a very important part of most cultures' outlook on the world, especially when it comes to worship systems and religion.
Due to the binary system and a slightly eccentric orbit, there is a sort of meta-yearly climate cycle over a period of around a decade, i.e.: the year 190 is the warmest year of the cycle, the year known (in Arlond, at least) as the great solstice, as is 200, 210, etc. the year 195, 205, and so on, are the coldest years of the cycle. Seasons occur annually as they do on Earth, but they are influenced heavily by this cycle.
The planet has one large-ish moon, probably similar in scale to our moon. It takes slightly longer to orbit the planet than our moon, and its orbit is more eccentric and irregular than ours, so months aren't really something that work out. Instead, years are simply divided in to seasons in most cultures.
The north pole lies on land, in the frozen wastes north of the mountain range in the north of Dach. South of Arlond is a peninsula of the continent called Felis, where the Illeli and Darin live. South of there has been explored very little, but it is widely believed that the south pole does not lie on land. The waters west of Arlond have also not been explored.