Description
Measure a forensic reference's signed calendar expiry margin.
Forensic records distinguish exhibit identity, container links, declared conclusions, timestamp resolution and measurement bases. A matching seal string or recorded certificate is not authentication or proof of custody. Redacted display text and salt-version labels also do not by themselves establish sufficient de-identification or lawful disclosure.
Measure a forensic reference's signed calendar expiry margin.
When to use this tool
Use Forensic Reference Expiry As Of Date when checking the stated exhibit record, measurement, time or display-policy convention.
How to use the tool and how it works
- Enter asOfDate, suppliedExpiryDate. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedCalendarDays. Use the output convention below.
Parse real supplied-expiry/as-of YYYY-MM-DD dates at UTC midnight. Return expiry-asOf calendar days.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| asOfDate | Real YYYY-MM-DD date under the UTC calendar convention specified above. | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| suppliedExpiryDate | Supplied Expiry Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedCalendarDays | Signed Calendar Days | Required. Safe integer. |
{
"input": {
"asOfDate": "2026-10-28",
"suppliedExpiryDate": "2026-11-01"
},
"output": {
"signedCalendarDays": 4
}
}Limitations and assumptions
- No certificate, reference-material stability, expiry inclusion policy or admissibility of a result is determined.
- 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
Review verified original evidence and custody records using qualified forensic and legal assessment for actual interpretation, disclosure and evidential decisions.
References
Similar or alternative tools
- Evidence Retention Order Date Gap
Measure a calendar gap associated with an evidence-retention order.
- Forensic Reference Certificate ID
Qualify an explicit reference-material certificate identifier without verifying certification or traceability.