Time Units & Terminology Definitions:
Calendar Tool by Merc
Quick cross-reference table
Vinetan span | Rotfront | Leng / Heimat | Kitezh | Buyan | Svaorg |
1 day | ~1 cycle | ~1 cycle | ~1 sol | ~0.25 circuits | ~1 shift |
1 week (7 days) | ~2 periods | ~7 cycles | ~7 sols | ~1.75 circuits | ~7 shifts |
1 month (~30 days) | ~8 periods | ~2 periods | ~1 Kitezh month | ~1 block | ~30 shifts |
1 quarter (~91 days) | ~26 periods | ~6 periods | ~1 Kitezh quarter | ~3 blocks | ~1.5 rotations |
1 year (~365 days) | ~1 season | ~1 Leng year | ~1.03 Kitezh year | ~1.62 orbits | ~2.07 solar days |
This cross-reference table converts Vinetan spans into the other six calendars.
The tables below give each calendar's units in Vinetan length. Their cross-references repeat the common Vinetan spans in local units, plus each calendar's year-scale unit back in Vinetan years.
Vineta (Earth-analog)
The Nation's constant calendar. 12-months, Gregorian leap rules.
Unit | Composition | Approximate Length |
Day | 24 hours | 1 day |
Week | 7 days | 1 week |
Month | 28-31 days (varies) | 1 month, 12 per year |
Quarter | 3 months | ~91 days |
Year | 365 days (366 in leap) | 1 Earth year |
Rotfront (Europa-analog)
No native week / month / quarter; structure goes straight from Cycle Period Season. Rotfront's leap season removes cycles.
Unit | Composition | Approximate Length |
Cycle | base unit | ~21.3 hours (≈ 0.88 day) |
Period | 4 cycles | ~85 hours (≈ 3.5 day) |
Season | 412 cycles regular / 404 leap | ≈ 1 Vinetan year |
Cross-references:
1 Vinetan week ≈ 8 cycles / 2 periods
1 Vinetan month ≈ 34 cycles / 8-9 periods
1 Vinetan quarter ≈ 103 cycles / ~26 periods
1 season ≈ 1 Vinetan year
Leng (Eris-analog)
A Leng year is divided into 23 hexadecimal periods, each with 16 cycles. Leng's leap year adds cycles.
Unit | Composition | Approximate Length |
Cycle | base unit | ~23.7 hours (≈ 1 day) |
Period | 16 cycles | ~16 days |
Year | 23 periods regular / 24 leap | 368 cycles (≈ 368 days) / 384 leap |
Cross-references:
1 Vinetan week ≈ 7 cycles (essentially equal)
1 Vinetan month ≈ 30 cycles / ~2 periods
1 Vinetan quarter ≈ 91 cycles / ~6 periods
1 Leng year ≈ 1.01 Vinetan years (slightly longer)
Heimat (Titan-analog)
Same architecture as Leng, but Titan rotates slightly slower than Eris; Heimat's leap correction reduces cycles.
Unit | Composition | Approximate Length |
Cycle | base unit | ~24.0 hours (≈ 1 day) |
Period | 16 cycles | ~16 days |
Year | 23 periods regular / 22 leap | 368 cycles regular / 352 leap |
Note: the cross-references match Leng. The cycle/period scales are nearly identical.
Kitezh (Mars-analog)
Kitezh's month structure mirrors Vineta's, but it is compressed. Days are called sols in keeping with Vineta (Earth) astronomical convention.
Unit | Composition | Approximate Length |
Sol | base unit | 1.026 days (Mars sidereal rotation) |
Month | 28-30 sols (mirrors Vinetan months, with 9 sols removed) | 1 Kitezh month, 12 per year |
Quarter | 3 months | ~89 sols (~91 Vinetan days) |
Year | 356 sols regular / 357 leap | ≈ 0.974 Vinetan years (shorter by ~9 days) |
Cross-references:
1 Vinetan week ≈ 7 sols (~7.2 days)
1 Vinetan month ≈ 1 Kitezh month (slightly shorter on Kitezh)
1 Kitezh year ≈ 0.974 Vinetan years
Buyan (Venus-analog)
Venus has no usable rotation period (243-day retrograde sidereal day), so Buyan has no native "day". The smallest unit is the circuit, tracking atmospheric super-rotation.
Unit | Composition | Approximate Length |
Circuit | base unit | ~4 days (atmospheric super rotation) |
Block | 7 circuits | ~28 days (about one Vinetan month) |
Orbit | 8 blocks (56 circuits regular / 57 leap) | ~225 days (~0.615 Vinetan years) |
Cross-references:
1 Vinetan day ≈ 0.25 circuits (one-quarter circuit)
1 Vinetan week ≈ ~1.75 circuits
1 Vinetan month ≈ 1 block / ~7.5 circuits
1 Vinetan quarter ≈ ~3 blocks
1 Buyan Orbit ≈ 0.615 Vinetan years
Svarog (Mercury-analog)
Mercury's 3:2 spin-orbit resonance means three rotations equal exactly one solar day. The base unit is the rotation. Like Leng & Heimat, Svarog derives its near-day unit by subdiving the planet's spin, rather than borrowing Vineta's clock: 59 shifts per rotation. The calendar has no leap-year rules.
Unit | Composition | Approximate Length |
Shift | 1/59 of a rotation | ~0.994 days (just under 1 Vinetan day) |
Rotation | base unit; 59 shifts | 58.646 days (Mercury sidereal rotation) |
Solar Day | 3 rotations (177 shifts) | ~176 days (~0.482 Vinetan years) |
Cross-reference:
1 Vinetan day ≈ 1.006 shifts
1 Vinetan week ≈ ~7 shifts
1 Vinetan month ≈ ~30.6 shifts (about half a rotation)
1 Svarog rotation ≈ ~2 Vinetan month
1 Svarog solar day ≈ 0.482 Vinetan years