The rather basic (and lacking any flair) calender of Xereus was crafted generations ago to provide a common form of time keeping for business' and nations.
While some other nations favour their own calender's, such as the Allinian calendar, Haptos' simplicity has meant it is the most common and most widely accepted.
Consisting of twelve uniform months of 30 days, four holidays spread out throughout the year, ten days a week, three weeks a month, and four accepted seasons, the Haptos calendar is a useful tool for all.