Calendar

Gaia has a 24 day and a 365 day year but the names for the days and the divisions of the year has no consistency set by nature.

Dates are commonly given in years PA (or years Post Aruseus (BA is Before Aruseus) which refers to the date upon which Aruseus was given The Great Hammer)

New Achthalian
The Achthalian calendar was subsequently modernised in 737 to centre the winter solstice and bring the number of months up to 12