The same SOLE moment, across every context.
Different local clocks, one shared stamp. Agency offices keep their local time. Operations point upward to one stable mission reference.
Understanding the timestamp.
SOLE looks like 6:3156:0.3065 — here is what each part means.
SOLE is a universal temporal reference standard. It expresses any moment as a single stamp that reads identically on Earth, in orbit, on the Moon, or on Mars. Local time zones and Earth-centric standards become irrelevant.
UTC is Earth-centric — tied to Earth's rotation and expressed through local time zones. SOLE uses a continuous count from a fixed human space-age epoch. No timezone conversions required. No ambiguity across environments.
SOLE counts from 04 October 1957 — the day Sputnik I launched and the human space age began. SOLE Day 1 is that date. All dates before it are pre-epoch archival only and have no SOLE stamp.
- Cycle — approximately 10 Earth years (3,652 days). Cycle 0 = 1957–1967.
- Day — numbered day within the current cycle, from 1 to 3,652.
- Fraction — fraction of the day elapsed: 0.0000 midnight UTC, 0.5000 noon, 0.9999 last second.
The first crewed lunar landing occurred at 20 Jul 1969 — 20:17:00 UTC. In SOLE: 1:656:0.8451.
- Cycle 1 — the second ten-year period of the space age (1967–1977)
- Day 656 — the 656th day within Cycle 1
- Fraction 0.8451 — 84.5% of the day elapsed, shortly before 21:00 UTC
One timestamp, many contexts.
| Reference point | Type | Offset | Local / mission time | SOLE | Note |
|---|
Different environments, same SOLE stamp.
SOLE does not shift for planetary day length. The stamp is universal. Local planetary time runs beneath it, not instead of it.
Standard reference. Multiple time zones, all reducible to UTC, all readable in SOLE.
- Day: 24h 00m 00s
- Seconds: 86,400
- SOLE fraction: 0.0000 → 0.9999
Missions use Mars Coordinated Time (MTC). A sol is 2.75% longer than an Earth day. SOLE stays universal above it.
- Sol: 24h 39m 35s
- Seconds: 88,775
- SOLE is the cross-context anchor
The lunar day is ~29.5 Earth days. No local time zones exist. SOLE is the only consistent cross-context reference.
- Lunar day: ~708 Earth hours
- Seconds: 2,551,443
- Earth local time is meaningless on the surface