Oikos Timekeeping & Calendar

TABLE OF CONTENS in the World Navigation

Oikos runs on two clocks:

• the planetary cycle (environmental; one long light–dark span), and
• a civil calendar of 24‑hour Standard days for everyday life, logistics, and intercity coordination.

The planetary day is ~120 hours (≈ 60 h light → long dusk → 60 h dark → long dawn). Civil time keeps society humane and synchronized; planetary time still drives biology (Heat/Rut clustering) and weather rhythms.

Planetary Time (Environmental)

• One planetary day: 120 hours = 5 Standard days.
• Structure:
• 0–5 h OIK: Dawn (dimmering up)
• 5–60 h OIK: Daylight
• 60–65 h OIK: Dusk (dimmering down)
• 65–120 h OIK: Night
• 120 h OIK: Next dawn (cycle repeats)
• Twilight corridors matter most: Omega Heat and Alpha Rut frequently cluster around dawn/dusk; planners load medical/security staffing into these windows. Weather pulses in several regions also key off the 120‑hour cadence.

Sunrise weekday hop. If sunrise is 06:00 on Deftéra, it returns at 06:00 five days later (SÁvvato), then five days later (Tríti), and so on—realigning to the same weekday and time every 35 days (5 weeks).

Civil Time (Standard)

Oikos uses a standardized civil system decoupled from the planet’s rotation so schedules don’t slip across the week.

• Standard day: 24 hours.
• Week: 7 Standard days, starting on Deftéra.
• Weekdays: Deftéra, Tríti, Tetárti, Pémpti, ParaskevÍ, SÁvvato, KyriakÍ.
• Months: 12 × 30 Standard days.
• Month names: Ianouários, Fevrouários, Mártiοs, Aprílios, Máios, Ioúnios, Ioúlios, Ávgoustos, Septémvrios, Októvrios, Noémvrios, Dekémvrios.
• Civil year: 360 Standard days (12 × 30).

Notation rule. In daily speech and documents, Standard time is assumed—no tag needed. Use tags only when clarity is required:

• HH:MM STD — civil clock
• OIK HHH:MM — hours into the current 120‑hour planetary day (e.g., OIK 82:15)

Back‑of‑the‑napkin conversions.

• 1 planetary day = 120 h = 5 Standard days.
• 1 civil month (30 d) ≈ 6 planetary day–night cycles.
• 1 civil year (360 d) ≈ 72 planetary day–night cycles.

Year Definitions & Drift

• Civil Oikos Year (what institutions use): 360 Standard days. It’s deliberately regular and not tied to the orbit.
• Astronomical (orbital) year: tracked by astronomers; civil life does not currently reconcile to it. As a result, “season‑like” cues (biology, weather pulses) are governed by the 120‑hour rotation and regional climate rather than month names.

(Design note. Intercalary holidays/festivals are not defined yet. When you add them, we can fold them in as drift‑reconcilers or pure cultural observances.)

Worked examples

• Sunrise cadence. Sunrise at 06:00 STD, Deftéra recurs at 06:00 STD, SÁvvato (five days later), then 06:00 STD, Tríti, etc. The same weekday/time repeats every 35 days.
• Clinic rostering. Add extra staff near OIK ~55–65 (dawn/dusk corr.). Pair Heat/Rut windows with hydration and recovery logistics.

World notes

• Society lives by the Standard week and months, while bodies and weather still pulse to the 120‑hour beat—especially in twilight belts. That tension is part of Oikos’ texture.