Difference between revisions of "Date Conversion"
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Please see [[History]] for a list of events. | Please see [[History]] for a list of events. | ||
− | == | + | == Description == |
=== Primary Calendars of the Imperium === | === Primary Calendars of the Imperium === | ||
As the largest and most dominant polity, the calendars of the Imperium have been central to interstellar trade and history although despite their wide use, they are still not an ''official'' or ''standardized'' galactic calendar. | As the largest and most dominant polity, the calendars of the Imperium have been central to interstellar trade and history although despite their wide use, they are still not an ''official'' or ''standardized'' galactic calendar. |
Revision as of 10:39, 5 May 2015
Date Conversion (Chronology) Synopsis
Each Major Race uses their own dating system, rendering date conversion between systems necessary on occasion. The following article outlines the workings of each system and defines the reference date that determines year 0 in each and how to convert dates between various systems.
Please see Dating systems for more information.
Please see History for a list of events.
Description
Primary Calendars of the Imperium
As the largest and most dominant polity, the calendars of the Imperium have been central to interstellar trade and history although despite their wide use, they are still not an official or standardized galactic calendar.
Imperial Calendar
- Main article: Imperial calendar
The Third Imperium uses a regularized version of the calendar originally developed on Terra. It shares seconds, minutes, hours, days and weeks with the Solomani version, but does not organize them into intermediate months. The Imperial year is exactly 365 days, or 52 weeks with one extra "Holiday" date. The calendar is, naturally, tied to the declaration of the founding of the Imperium by Cleon I.
Solomani Calendar
- Main article: Revised Gregorian Calendar
The Solomani have kept the same dating system that was in use before the Solomani invention of jump drive and coming into contact with the Ziru Sirka. Its reference date is tied to the birth of a popular religious figure from early Terran history.
The Imperial Calendar is heavily influenced by the Solomani dating system, and borrows most of its basic timekeeping units. However, instead of numbering days within a year, as in Imperial practice, days are numbered inside a month, twelve roughly equal subdivisions of the year. Further, the length of the year is subtly different as Solomani calendar still periodically adjusts to synchronize with the sidereal period of Terra around Sol (365.2425 days, thus the Solomani year is 1.0006644 Imperial years). Because of this difference, the first day of the two calendars are 0.74 years apart as of 1116.
Vilani Calendar
The Vilani also count from the founding of the Empire Ziru Sirka. Each Vilani year is ~1.312 Solomani year.
Secondary Calendars of Charted Space
Many other races employ calendars and time-keeping systems of importance to trade and history.
Aslan Calendar
- Main article: Aslan calendar
Aslan dating begins from the formation of the Tlaukhu. Each Aslan year is ~0.877 Solomani years.
Droyne Calendar
The Droyne calendar likely should start around -75,000 Imperial, however the Droyne don't keep good records either.
Hiver Calendar
- Main article: Hiver calendar
Hive Federation dates begin with the official proclaiming of Glea as the Federation capital. This occurred in 410 imperial, though the move was not officially completed until 490. While all official dates refer to this calendar, most Hiver nests use local dating systems.
A Cycle (day) is a little over 22 hours. A year is 143 cycles, each cycle simply numbered 1 to 143 with no month or week divisions. Thus, a Hiver year is about half an Imperial one (0.49 specifically).
1105 is 1389 HF; 1111 is 1401 HF (from CT AM 7 HIvers).
K'Kree Calendar
- Main article: K'kree calendar
The K'Kree dating system is also pre-flight. Each K'Kree year is ~1.2 Solomani, Their calendar starts with the founding of Rak'keer!, their capital city in -8145 Imperial.
Vargr Calendar
Vargr have no accurate calendar, so dating is meaningless, however a Vargr "year" is ~1.03 Solomani years.
Zhodani Calendar
- Main article: Zhodani calendar
The Zhodani chten is ~0.754 standard years. The calendar uses Olympiads, which is three chten, with an extra day to cover the leap years. An Olympiad is ~2.262 standard years. The Zhodani calendar uses the count of olympiad from the founding of the Psionic Games, plus a marker of which year (1, 2, or 3) into the current olympiad (e.g. 1244.1).
Equivalent Dates of Charted Space
Solomani | Imperial | Vilani | Zhodani | Aslan | K'Kree | Event |
---|---|---|---|---|---|---|
3,659 BC | -8,145 | 3,148 PI | -639.1 | -5,442 | 1 | Start of K'Kree calendar |
2,213 BC | -6,731 | 2,046 PI | 1.1 | -5,301 | 1,186 | Start of Zhodani calendar |
AD 1 | -4,520 | 361 PI | 981.2 | -2,779 | 3027 | Solomani calendar begins |
AD 473 | -4,045 | 1 VI | 1,192.2 | -2,237 | 3,422 | Start of Vilani calendar |
AD 2435 | -2,083 | 1,496 VI | 2,058.3 | 0 | 5,055 | Aslan calendar Begins |
AD 4518 | 0 | 3,084 | 2,979.3 | 2,376 | 6,788 | Start of Imperial calendar |
Conversion Chart
Read down for date of origin, then across to calendar to convert.
Source (x) | Solomani | Imperial | Vilani | Zhodani | Aslan | K'Kree | Hiver |
---|---|---|---|---|---|---|---|
Solomani | n/a | (x - 4518) / 1.0006644 | |||||
Imperial | (x * 1.0006644) + 4518 | n/a | (x + 4045)/1.312 | (x + 6731)/2.26 | (x + 2083) / 0.877 | (x + 8145) / 1.2 | (x - 410)*2 |
Vilani | (x * 1.312) - 4045 | n/a | |||||
Zhodani | (x * 2.26) - 6731 | n/a | |||||
Aslan | (x * 0.877) -2083 | n/a | |||||
K'Kree | (x * 1.2) - 8145 | n/a | |||||
Hiver | (x/2) + 410 | n/a |
Note that converting from a calendar that does not have a zero year (e.g. Solomani, Vilani, Zhodani, K'kree) i.e. the 0 point is an instant in time, rather than a complete year, must account for the "missing" year when going from "negative" dates to positive ones.
This article is incomplete meaning it lacks important features, structure, or content. More work needs to be done to make this a good article. This is step 4. in the article refinement process.
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Other Race Calendars of Note
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Date Conversion (Chronology) History & Background (Dossier)
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Date Conversion (Chronology) References & Contributors (Sources)
This article is missing source reference/s. At least one reference, citation, or author if non-canon should be listed for most articles.
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