Description
Require latest at least earliest and subtract for width.
Calendar coordinates depend on an era, origin, day-start rule, and sometimes an arithmetic rather than observational convention. A supplied coordinate difference does not resolve those choices.
Require latest at least earliest and subtract for width.
When to use this tool
Use Chronology Event Interval Width when you need a documented calendar convention or source-coordinate comparison.
How to use the tool and how it works
- Enter earliest, latest. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read width. Use the output convention below.
Require latest at least earliest and subtract for width.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| earliest | Earliest | Required. Finite number. |
| latest | Latest | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| width | Interval or dimension span under the stated unit and endpoint convention. | Required. Finite number. |
json
{
"input": {
"earliest": 1800,
"latest": 1825
},
"output": {
"width": 25
}
}Limitations and assumptions
- Both inputs share a coordinate and unit; this continuous interval width does not include an extra endpoint or infer date precision and historical certainty.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Consult the source calendar and authoritative date information for actual observance, conversion, or historical dating.
References
Similar or alternative tools
- Historical Date Bound Width
Return latest-earliest, adding one when includeEndpoints.
- Calendar Gap Duration Correction
Subtract omittedDays from labelDifference and add repeatedDays for elapsedDays.