Timekeeping

Calendar Timescale

Universal Civil Calendar

The year is 2494 in the Universal Civil Calendar, used for most interstellar communication and coordination. Though the UCC is primarily derived from the Gregorian calendar (referred to as the “Gregorian Standard”), it was designed to incorporate elements of other internationally significant calendars, such as the Hijri, Solar Hijri, and Minguo Calendars.

The UCC is a lunisolar calendar based on the revolution of the Earth around the Sun, and the Moon around the Earth.

Colonial/Local Calendar

Colonial calendars, or local calendars, are designed to reflect the movement of local planetary bodies around their stars, as well as the tidal forces of any orbiting moons. They are primarily used in agriculture, though scientific and social endeavors may be affected by the local calendar.

Local calendars are referred to by the planet on which they are based. For example, the calendar used on the planet of Sophia in the Delta Pavonis system is known as the Sophian Colonial Calendar.


Clock Timescale

Coordinated Universal Time (UTC)

UTC is the human interstellar standard for timekeeping, based on the 24-hour rotation of Earth, and most commonly used for coordination between planets and systems or in ships outside of planetary orbit. Most ships and buildings are capable of tracking UTC internally, but a network of quantum-entangled stations scattered throughout human inhabited space sets the official UTC standard.

Since human circadian rhythms are best attuned to the UTC standard, most ships, installations, and other settlements set their time-sensitive activities to match it, such as dimming lights between 2000 and 0600 hours and setting work or duty schedules along 4 hour divisions.

Coordinated Local Time (LTC)

Used on the surface or in orbit of individual planets, the LT standard varies based on local planetary rotational periods. Most timepieces can be configured to show either UTC or LT, or else both side-by-side. LT standards are usually set by an official body on a planetary capital.

LT is often of secondary importance, only used to indicate local sunrise and sunset times, or other local phenomena.

Timekeeping

Outremer Basileus Basileus