Description
Compare them literally and JSON-encode [firstCalendar,firstDate,secondCalendar,secondDate] as key.
Historical and regional records connect source vintages, era coordinates, folio sides, time coverage and locally defined units. Literal tokens and supplied offsets can organize metadata without authenticating an archive or establishing historical calendar equivalence. Preserve the original source and its conventions.
Compare them literally and JSON-encode [firstCalendar,firstDate,secondCalendar,secondDate] as key.
When to use this tool
Use African Archive Dual Date Token when checking the stated regional archival, chronology, coverage or unit convention.
How to use the tool and how it works
- Enter firstDate, secondDate, firstCalendar, secondCalendar. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read sameCalendar, key. Inspect sameCalendar before interpreting the associated values.
Require nonempty calendar labels. Compare them literally and JSON-encode [firstCalendar,firstDate,secondCalendar,secondDate] as key.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstDate | First Date | Required. Text; maximum UTF-16 length 8192. |
| secondDate | Second Date | Required. Text; maximum UTF-16 length 8192. |
| firstCalendar | First Calendar | Required. Text; maximum UTF-16 length 8192. |
| secondCalendar | Second Calendar | Required. Text; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| sameCalendar | Same Calendar | Required. Boolean. |
| key | Key | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"firstDate": "1900",
"secondDate": "1317",
"firstCalendar": "Gregorian",
"secondCalendar": "Hijri"
},
"output": {
"sameCalendar": false,
"key": "[\"Gregorian\",\"1900\",\"Hijri\",\"1317\"]"
}
}Limitations and assumptions
- Date strings are preserved without parsing or conversion; matching labels do not prove two dates refer to the same day.
- 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.
Alternative or Complementary methods
Consult the original archive and appropriate historical/calendar/unit authorities for provenance and substantive interpretation.
References
Similar or alternative tools
- Public African Era Year Gap
Add supplied integer source/target origins to their whole year coordinates using exact arithmetic.
- Public Calendar Era Offset
Return yearCoordinate+suppliedOffset, allowing signed real coordinates and offsets.