The Geban Calendar

Planetary Data

Geba is a brown dwarf, a body that accumulated enough mass to compress its core but never reached the threshold for sustained fusion. Its radius of 88,971 km produces a surface area of approximately 99.5 billion square kilometers. The eleven inhabited continents together account for less than 10% of that surface. The Uncharted alone covers over 70%. The conditions required for habitability at this scale were engineered by the Velcrith over an unknown preparatory period before any biological life existed on the surface. Eira Vey's The Parent Preceded The Children traces that transformation.

Gravity

An unmodified brown dwarf of this radius would produce surface gravity dozens of times beyond what any biological system can survive. The Velcrith restructured Geba's interior over an unknown duration, converting the dense core material into a differentiated layered interior and redistributing mass from the compressed center outward into graduated density shells. This reduced gravitational acceleration at the surface without reducing the planet's volume.

The three Child stars orbit in a stabilized braid configuration, and their gravitational influence is essential. The combined tidal forces of three stellar-mass bodies in close orbit exert a persistent outward pull on Geba's upper layers, partially counteracting surface gravity in a pattern that shifts with their orbital positions. Surface gravity therefore fluctuates regionally depending on the alignment of the Children, the local thickness of the crust, and the density of the mantle beneath. Coastal and low-elevation regions experience slightly lower effective gravity than deep continental interiors.

The result is a surface gravity that is elevated but survivable. All populations exhibit denser bone structure, thicker muscle fiber, and cardiovascular systems built for sustained effort under load. Groups adapted to the most extreme conditions, such as the Ngorrhali of the stratospheric passes, represent the far end of this adaptation.

Atmosphere

Geba's sky is as outsized as the world beneath it. The Velcrith built an atmosphere to the planet's scale, and the tidal pull of the Children that eases surface gravity also lifts the upper air and holds it far higher than gravity alone would allow. The densest air, where weather forms and nearly all life is lived, fills roughly the first twenty kilometers above sea level.

Above that the air thins slowly. Peoples adapted to it still breathe at around thirty kilometers, the height of the highest inhabited passes in Ngorrhal. The stratospheric band climbs past every surveyed summit, the Ngorrhali ranges near forty-eight kilometers and the distant peaks of the Uncharted beyond sixty. High flight begins above it, from around seventy kilometers, where the air is thin enough for airships to reach their greatest speeds without the heat and pressure of the lower sky tearing at their hulls.

No one knows where the sky ends. Instruments carried on the tallest relays and the highest-flying hulls have read air past a thousand kilometers without finding its edge, and every reading taken higher has only pushed the estimate further out. Every attempt to leave the planet has failed, the Veykar-Solarn rockets among them. A craft would need well over a hundred thousand kilometers an hour to break free, and it would still have to climb through a sky whose top has never been found.

That depth shapes everything that moves through it. A full circuit of Geba runs close to 559,000 kilometers, so speeds that would be extreme on a smaller world are ordinary travel here. In the dense lower air, a large hull moving at hypersonic speed close to the ground drives a wake that flattens what lies beneath it, which is why routes over settled land are flown low and slow or sent high.

Three Child Stars

Geba's immense scale means that different regions of the same continent can experience the stars entirely differently. Climate is determined by continental position and by placement on a sphere so vast that orbital geometry creates extreme regional variation.

There is no global day-night cycle. Illumination varies by region, determined by position relative to all three orbital paths. The imperial day is standardized by Izhara's position over the capital on Geba continent as an administrative convenience, and it does not describe conditions across the planet.

Regional Light

Desert East

Inland Thazvaar lies within Izhara's direct orbital path. White-blue light strikes at steep angles for extended periods of the 32-hour cycle. When Zhaerys aligns overhead during its slow orbit, the compounded illumination creates the most extreme surface temperatures on the inhabited planet. The desert is the product of sustained stellar exposure across a landmass of roughly 5 billion square kilometers; distance from water plays no part in it.

Frozen West

Ngorrhal sits angled away from Izhara's primary path, receiving glancing light during the day cycle and extended periods of shadow. It is also far enough north that Saethern provides little warmth, hanging low on the southern horizon or disappearing entirely depending on season and precise location. Ngorrhal exists in the gap between light sources. The Frost Sentinels adapted to this over millennia.

Silver South

Saethera lies directly beneath Saethern's fixed position. The silver light never sets and full darkness never arrives. Temperature holds constant between 10-25°C. Bioluminescent fungal forests and vast moss oceans dominate the lowlands, thriving in perpetual twilight. Light-reactive flora and aggressive fauna devour outposts and repel settlement. Only Scout-Class Engineered, accompanied by Assault-Class companions, form small self-sustaining communities here. A few imperial outposts cling to the northern coast. Saethera remains untamed.

Temperate Center

Geba continent, the imperial heartland, occupies a position that receives moderate Izhara exposure and partial Saethern visibility depending on season. Neither frozen nor scorched, it became the administrative center of the empire in part because its climate permitted the largest stable population density. The 32-hour day and the calendar itself are measured from here.

The Uncharted

The Uncharted lies on the far side of the planet and is larger than all other continents combined. What light conditions exist there, whether the orbital geometries create zones of total darkness, perpetual illumination, or something else entirely, remains unknown. All navigation systems fail when approaching. The few who have glimpsed its coastal edges and returned report temperature swings from -90°C to 120°C within hours. Imperial doctrine forbids entry.

Imperial Day

The imperial day consists of 32 hours, measured by Izhara's position over the capital on Geba continent. This standardization allows administrative coordination across the empire, though local experience of light and darkness varies enormously by region. A citizen in Ngorrhal and a citizen in Inland Thazvaar may both record the same hour, but one stands in dim cold while the other endures searing brightness.

Hours are not formally subdivided for civilian use. Common speech references "early in the hour," "mid-hour," and "late hour." Military and scientific contexts employ precise measurements, but these systems are not standardized across institutions.

Geban Year

The Geban year consists of 520 days divided into 16 months. Odd-numbered months contain 33 days; even-numbered months contain 32 days. The year begins with the Izhara-Zhaerys eclipse, when the two stars' differing orbital planes briefly align as seen from the capital.

There are no weeks. Days are numbered within months.

Year Notation

The Geban Calendar was formalized by Ayitha Solarn during the Era of Early Stagnation. The Solarn family was already well established by this point, but Ayitha's work diverged from the relay engineering that defined the rest of her lineage. While her family focused on making relays stronger, faster, and more reproducible, Ayitha invented atmospheric sensors that utilized existing relay infrastructure to detect air pressure shifts and frequency changes across regions, giving populations in remote areas advance awareness of incoming weather conditions. The system she built was the first to use the relay network for environmental monitoring, beyond communication and power distribution, and it became the direct precursor to later systems such as the Sentinel weather tracking system and the Saojuul weather pattern and disaster alert system. Her work required extensive travel across the planet to calibrate sensors against regional conditions, which gave her and other Solarns the first accurate representation of how the three Child stars moved relative to Geba and how their positions directly affected conditions from gravity to weather. The Geban Calendar was produced from this understanding and adopted as the global standard, with the only variables remaining uncertain being those of the Uncharted landmass and deep Inland Thazvaar, where relays have never been established long enough to record accurate data. Geban history is divided into three temporal categories relative to the establishment of this calendar.

Date Format

Standard date notation places day first, then month, then year with era suffix.