Imperial Calendar

The Calendar of Harptos defines the year for most of the Eternal Empire. It is a 365-day year divided into 12 months of 30 days - or 3 tendays - each. Five special days fall between the months, and every four years a leap day (known as Shieldmeet) is added to the calendar immediately following Midsummer night. A day is 24 hours long, broken up by the rising and setting sun. Most people break up the day into large slices - dawn, morning, highsun (noon), afternoon, dusk, sunset, evening, midnight, moondark (night's heart), and night's end. These are of necessity and not exact, as there is often confusion from travelers in foreign lands. A tenday is also, though less commonly, called a ride, and consists of ten days. The days do not have names, but are instead referred to by number: first-day, second-day, and so on. Most people count using their thumbs as first-day; halflings, however, are famous for using their pinkies to count first-day, and thus the phrase "counting like a halfling" has come to mean someone is being different just to be difficult.

Furthermore, every 1000 years since the Arcane Revolution has been designated as an imperial "Age", with the campaign beginning in the 10th age of the Empire.

The months and holidays are listed below; the days of the solstices and equinoxes are:
Winter Solstice: Nightal 20
Spring Equinox: Ches 19
Summer Solstice: Kythorn 20
Autumn Equinox: Eleint 21