Rodorsceaft: Pillar of Heaven
First, the definition of “day:”
The people of Rodorsceaft near-universally reckon their days by the position of the sun in the sky, whether the day begins at sunrise, sunset or highsun. (No Rodorsceaft culture reckons their time from midnight.) The position of the sun in the sky is determined by two factors: the rotation of the tree and the orbit of the sun itself.
As discussed on the Astronomy page, the tree rotates on its axis once every 24 Earth hours (86,400 SI seconds). The sun has an orbital period of exactly 20 Earth days. This means that the sun returns to its position in the sky every 90946.62 Earth (SI) seconds, giving a Rodorsceaft day length of 1 day, 1 hour, 15 minutes, 46.62 seconds in Earth time.
Of course, Rodorsceaft mechanical clocks hold to the 24-hour day convention, meaning their “second” is slightly longer than ours. A Rodorsceaft second is 1.0526 SI seconds in length, presuming they had mechanical timepieces with that level of precision (they don’t).
There are several calendars in use by the various peoples of Rodorsceaft.
The Solarian Empire
The Solarians, with their emphasis on light, use a Solar calendar, of 358 days’ length. Their New Year is aligned to coincide with the day of the sun’s deepest penetration to the inner tree; their temples are built to take advantage of this angle and create spectacular displays of natural light within them when the sun is in proper alignment.
The Solarian calendar is divided up into 12 periods of 29 days each. The remaining period is the great festival of Lumine, which begins on the New Year and lasts for ten days.
The Solarian periods, in order following Lumine, are Primus, Secundus, Tertius, Quartus, Quintus, Sextus, Septimus, Octimus, Novimus, Decimus, Pridecimus and Dodecimus.
The Solarians keep an eight-day week, comprised of seven days of labor and one day of piety. The days are each named after one of the Solarian virtues.
The Solarians number their years anno Solaris, the number of years that have passed since the Empire was founded after the end of the Demon War. The New Year is reckoned on the first day of Lumine, so it is currently aS 981.
The Solarian Year is used for all official business in the Mysidian Empire.
The Druids use a calendar based on the movement of the pale moon, which has a period of 19 days. Their calendar is divided into 6 long months of 57 days and one short month of 19 days, for a total of 361 days, which aligns reasonably closely to the solar cycle. The long months are divided into early (Cyn), late (Hwyr) and mid (Canol) periods of 19 days each, for 19 19-day cycles in the Druidic year.
The Druidic long months are (in order) Braenar, Tymestl, Ennyn, Planiad, Prifio and Cynhaeaf. Cynhaeaf is followed by the festival month of Mawr Helfeydd, the last day of which is the Druidic new year.
The Druids also observe eight seven-day weeks per long month, with the last day of each month reserved for a minor festival. The days are Oakday, Ashday, Rowanday, Yewday, Elmday, Beechday and Birchday.
The Druids number their years in terms of the reign of the current Hierophant; the structure is “Blwyddi name-of-Hierophant.”
In terms of this campaign, the current Hierophant is named Bloddeuwydd of the Lily, who has been the Hierophant for about six years. Since the year count begins at the New Year, when the Hierophant officially assumes his position, it is currently Sixth B.Bloddeuwydd.
The Druidic calendar is used in the hinterlands, the outskirts of the various empires, and amongst many of the tribal societies.
The Gnomes maintain an elaborate calendar system based on the unseen pulse of the Universal Clock. For each Rodorsceaft day which passes, the Gnomish calendar increments by ~1.0526. Since precise Gnomish dates tend to get unwieldy (the “current date” of the campaign setting is in the neighborhood of 2455125.0), the Gnomes tend to use the first three numbers as the date and the remaining number as the year. Thus, to a gnome, it is “currently” Day 125, year 2455.
The Gnomish Year is approximately 950 days, or 2.6 Solarian Years.
There are few timepieces accurate enough to gauge time more precisely than by the hour, and even timepieces of that precision are quite expensive. While any user of arcane magic is capable of using a cantrip to tap into the Universal Clock, most people find reckoning by the hour to be quite sufficient for their needs.
A “minute,” to most residents of Rodorsceaft, is “a short time,” where “minutes” could be understood to be a slightly longer time. The concept of “second” is virtually unheard of except amongst the Gnomes and Mechanists, and would not be used in conversation. So, while someone would say “Just a minute,” or “Give me a few minutes,” they would never say “fifteen seconds” or even “a few seconds.”
If an expression of time of greater precision than this is needed, one might say “a heartbeat” or “a few beats.” A bard might also be inclined to express a short passage of time musically, i.e. “an eighth” or “a fourth” or “give me a half-note.”