Description
Check a supplied date against an explicit blackout-date list.
Administrative records depend on policy dates, authorization scope, attendance denominators and accounting definitions. A calendar-date shift does not skip holidays, a quorum fraction is not a quorum decision, and a weighted voting fraction differs from economic ownership. Recorded signatory presence does not authenticate a signature or establish authority.
Check a supplied date against an explicit blackout-date list.
When to use this tool
Use Business Calendar Blackout Day Flag when you already have date, blackoutDates and need to check a supplied date against an explicit blackout-date list.
How to use the tool and how it works
- Enter date, blackoutDates. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read blackout. Inspect blackout before interpreting the associated values.
Validate the date and every list entry as real UTC YYYY-MM-DD; return exact list membership.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| date | Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| blackoutDates | Every entry must be a real date, including nonmatching entries; duplicates are accepted and weekends are not added automatically. | Required. Array of text; maximum UTF-16 length 8192; maximum items 256. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| blackout | Blackout | Required. Boolean. |
{
"input": {
"date": "2026-12-25",
"blackoutDates": [
"2026-12-25",
"2026-12-26"
]
},
"output": {
"blackout": true
}
}Limitations and assumptions
- Duplicates are accepted and invalid unused entries still reject input. No holidays, weekends, workday calendar, booking or policy is inferred.
- 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
Check controlled policies, meeting records, contracts and account definitions. Apply the complete applicable rules when actual approval, payment or governance matters; local version selection and arithmetic do not make those determinations.
References
Similar or alternative tools
- Delegation Expiry Business Date
Measure calendar days until a supplied delegation expiry date.
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