Description
Format a validated date anchor plus a signed day-offset literal.
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.
Format a validated date anchor plus a signed day-offset literal.
When to use this tool
Use Relative Date Anchor Literal Formatter when checking a supplied date-label, duration or interval convention.
How to use the tool and how it works
- Enter anchor, offset. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read literal. Use the output convention below.
Format a validated date anchor plus a signed day-offset literal. Require a real YYYY-MM-DD and whole offset in [-1000000,1000000]; append explicit plus for nonnegative offset and D suffix.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| anchor | Anchor | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| offset | Offset | Required. Safe integer; minimum -1000000; maximum 1000000. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| literal | Literal | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"anchor": "2024-01-01",
"offset": 3
},
"output": {
"literal": "2024-01-01+3D"
}
}Limitations and assumptions
- No date arithmetic is performed; the literal is a local notation, not universally accepted ISO syntax.
- 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
- Civil Date Year Two Digit Window
Return two-digit year text and explicit-window membership.
- Date: Signed Day Offset Label
Label the sign of a bounded whole day offset.