Year

A Year is a unit of time.

• It is a standard Imperial metric.

Description (Specifications)

An Imperial year (a "standard year") is a frequently used large unit of time. It is used to overcome difficulties caused by having non-uniform local times on each world and system.

• It is equal to 365 standard days
• The common Imperial usage is yr.

The Imperial Calendar provides a handy reference tool.

Equivalent Metrics

Other interstellar cultures have different values for a year, generally based on the orbital period of their homeworld around its star.

• Chten (Zhodani): 275.2 standard days.
• Ftahea (Aslan): 320 standard days.
• Pim!bigr (K'kree): 440 standard days.
• Terran year (Solomani): 365.25 standard days.
• Vlandian: 478.72 standard days, 360 dran-dir (local days).

Term Usage Example

Construction times for large starships are generally measured in years.

History & Background (Dossier)

Technologists found the year useful as the concept of the Technology Level and standardized ideas about sophont society development began to take form.

Imperial & Solomani Term Usage

The Solomani define the year as the orbital period of Terra around Sol, the system's primary star. It is equal to 365.25 standard days.

Modern Imperial usage bases the year on the orbital period of Capital round its sun, which happens to have an almost identical orbital period to that of Terra around Sol. It was broadly adopted within the Imperium following the Solomani Rim War, in order to avoid the use of specifically Terranocentric metrics.

References & Contributors (Sources)

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Far Future Enterprises or by permission of the author. The page history lists all of the contributions.

• Marc Miller. Imperial Encyclopedia (Game Designers Workshop, 1987), .
• Frank Chadwick, Dave Nilsen. Fire, Fusion, & Steel (Game Designers Workshop, 1994), 5,7.
• Marc Miller. T5 Core Rules (Far Future Enterprises, 2013), —.