Established during The Lost Ages, the Herthlan Calendar was one of the few relics that survived into the following Ages, thanks to it being so heavily ingrained into the various cultures. The Calendar is divided into 4 seasons, with each season having 3 months, totalling to 12 months. The first two months of each season have 32 days, with the third month having 35 days. This totals to 396 days in each year.
The first season, Spring, consists of the months Stromus, Norus, and Celestus. Summer has Kimbra, Cegunus, and Aquanis. Fall has Saramba, Nallus and Vitae, and winter follows suit with Domire, Tania, and ends out the year with Manta. For all cultures across Herthlan, the last three days of the months of Celestus, Aquanis, Vitae, and Manta all hold special significance. In Mor'Thar, they are often periods of fasting and introspection on their Sobrist beliefs. The Dwarves use this time to either work out their excesses, or to contemplate on temperance. Althia, The Elven Lands, and Shotani all spend the extra three days in festivals, celebrating the Fae and Grand Fae that exist in their lands. Sanar does this as well to a lesser extent, but mostly spends it reflecting on their Five Ways Philosophy.
There are six days of the week: Somnia, Auventis, Ingri, Fluma, Laptis, and Corpora. Corpora is usually treated as a day of rest for most, though some cultures may allow for other days as well. Each day consists of 25 hours, with an average of 14 hours of daytime. Many cultures consider the 25th hour of the day as The Fae's Hour, a time when one must be indoors to prevent interfering with the work of the little spirits that heal the land.
When refering to the date, the full format is "The Day of the Month in the Year of the Age", although it's shortened a little for writing. For example, "The 3rd of Saramba in Year 946 of the Age of Chains." The same day written out would be 3, Saramba, 946, Age of Chains", though some may also write "3rd". If someone is referring to something that hapened in the current age, then they'd leave off the age, and the same could be said for the year if it's an event of the current year.