Description
Return two-digit year text and explicit-window membership.
Date labels and intervals depend on origins, endpoint inclusion and calendar versus elapsed-time conventions. Numeric serial periods and local token formats can represent useful bookkeeping without resolving a real instant or official fiscal rule.
Return two-digit year text and explicit-window membership.
When to use this tool
Use Civil Date Year Two Digit Window when checking a supplied date-label, duration or interval convention.
How to use the tool and how it works
- Enter year, windowStart. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read twoDigit, representable. Inspect representable before interpreting the associated values.
Return two-digit year text and explicit-window membership. Require year 1-9999 and windowStart 1-9900; representable tests year in [windowStart,windowStart+100).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| year | Year | Required. Safe integer; minimum 1; maximum 9999. |
| windowStart | Window Start | Required. Safe integer; minimum 1; maximum 9900. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| twoDigit | Two Digit | Required. Text; maximum UTF-16 length 8192. |
| representable | Representable | Required. Boolean. |
{
"input": {
"year": 2024,
"windowStart": 1970
},
"output": {
"twoDigit": "24",
"representable": true
}
}Limitations and assumptions
- This formats a supplied year rather than interpreting ambiguous two-digit text or selecting a century automatically.
- 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
Use a complete date/time implementation and the applicable calendar policy for actual scheduling and interval interpretation.
References
Similar or alternative tools
- Proleptic Year Signed Padding
Format a signed proleptic year with minimum digit width.
- Relative Date Anchor Literal Formatter
Format a validated date anchor plus a signed day-offset literal.