Long Now 10,000-Year Clock Status Lookup

Return a dated Long Now Foundation assembly-status snapshot, solar-energy concept, design principles, chime program, or 1999 prototype history.

Description

The 10,000 Year Clock project separates long-term engineering goals from dated assembly progress.

The 10,000 Year Clock project separates long-term engineering goals from dated assembly progress. A project-status snapshot should be read with its retrieval date.^[1]

Return a dated Long Now Foundation assembly-status snapshot, solar-energy concept, design principles, chime program, or 1999 prototype history.

When to use Long Now 10,000-Year Clock Status Lookup

Use this tool to return a dated Long Now Foundation assembly-status snapshot, solar-energy concept, design principles, chime program, or 1999 prototype history.

Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.

How to use Long Now 10,000-Year Clock Status Lookup and understand its results

Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.
Enter statusFocus using the field table and calculation rules, then run the tool.
Read keyDate, statusFocus, verifiedStatement. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
statusFocus	Long Now 10,000-year clock status focus	string; one of "assemblyStatus", "energy", "designPrinciples", "chimes", "prototypeHistory"	Required

Select an exact supported statusFocus value from the field table and run the lookup. The implementation selects a fixed local table entry and returns the fields shown below. Matching is case-sensitive, with no trimming, synonyms or free-text search. Any keyDate output can be a date, period or context label.

result=stored entry for selected focus

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
keyDate	Project date or status	string
statusFocus	Long Now 10,000-year clock status focus	string
verifiedStatement	Verified Long Now statement	string

json

{
  "input": {
    "statusFocus": "assemblyStatus"
  },
  "output": {
    "keyDate": "official project page accessed 2026-09-24",
    "statusFocus": "assemblyStatus",
    "verifiedStatement": "The Long Now Foundation states that the first monument-scale 10,000 Year Clock is still being assembled inside a mountain in West Texas."
  }
}

Limitations and assumptions

The assembly entry is dated 2026-09-24; it is not a current construction-status query. No sources are fetched or statements updated at runtime.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Christiaan Huygens Pendulum History Lookup: Return a Smithsonian or APS-verified fact about Huygens's 1656 pendulum clock, 1657 patent, Galileo distinction, balance spring, or marine limitation. For a complementary task, use John Harrison H4 Longitude History Lookup: Return a Royal Museums Greenwich fact about the 1714 Longitude Act, H4's completion, Barbados trial, 1765 payment dispute, or 1766 Royal Observatory test.

References

Long Now 10,000-Year Clock Status Lookup — tool.io

Similar or alternative tools

Christiaan Huygens Pendulum History Lookup
Return a Smithsonian or APS-verified fact about Huygens's 1656 pendulum clock, 1657 patent, Galileo distinction, balance spring, or marine limitation.
John Harrison H4 Longitude History Lookup
Return a Royal Museums Greenwich fact about the 1714 Longitude Act, H4's completion, Barbados trial, 1765 payment dispute, or 1766 Royal Observatory test.