Verenean Calendar

The nine great city-states of Tilea, as well as all the minor merchant-princedoms, towns, and villages they influence, use the same calendar system, one said to have been given to the nation by Glorious Myrmidia herself. Called the Verenean Calendar (il calendario Vereno), it uses the passage of Mannslieb (Occiodiveren) to record time, and divides the year into 16 months of 25 days, each with 5 weeks of 5 days.

Tileans believe that Myrmidia was taught by her mother, Verena, how to mark time by observing the heavens, which was why she installed a lunar calendar as her nation’s dating system when she united all Tilea and Estalia. Unsurprisingly, Estalians also use the same calendar; however, they start it from a different date. Indeed, the start date of the calendar has long been a source of friction between the princedoms of Tilea and the kingdoms Estalia, as it drives to the root of the religious differences between the two lands. This calendar is widespread across the Old World, and has long been used in distant corners of the Empire, even before northern tribes mixed with those of the south. Many Taalites and Manannites claim the calendar, and its lunar cycles are observed by some ancient forest and coastal communities.

Similarly, many Tileans use the Imperial Calendar or one of its many variants. This is especially the case in the northern city states of Miragliano and Trantio, for they more frequently deal with Bretonnians and Imperial folk.

Source

 * : Warhammer Fantasy RPG 2nd ED -- Tome of Salvation
 * : pg. 141