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ISO Week Date & Calendar Decomposition API
x402
ISO Week Date & Calendar Decomposition API is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Converts a date into ISO 8601 week-date components (year, week number, weekday), plus ordinal day-of-year, quarter, and days remaining in the year.
Price / call$0.001
Success—
StatusUnknown
How this service works
Convert a date to its ISO 8601 week-date (year, week number, weekday), ordinal day-of-year, quarter, and days remaining in the year.
Output
Returns the ISO 8601 week-date components: ISO week-year (which may differ from the calendar year near year boundaries), ISO week number (1–53), ISO weekday number (1=Monday, 7=Sunday), the ordinal day-of-year (1–366), the calendar quarter (1–4), and the number of days remaining in the year.
Example use cases
Project sprint week numbering
“Our sprint planning tool uses ISO week numbers — what ISO week number, week year, and weekday does October 6, 2025 fall on?”
Quarterly reporting date check
“I need to know which quarter November 28, 2025 falls in, plus how many days are left in the year from that date.”
Day-of-year milestone tracking
“What is the ordinal day of the year for July 4, 2025, and what ISO week number does it land in?”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/iso-week-dateWhen to prefer
Choose this endpoint when you need precise ISO 8601 week-date decomposition alongside ordinal and quarter data in a single call, especially for scheduling, sprint planning, reporting pipelines, or calendar-based logic that requires week numbers — rather than building this logic manually or using a generic date library.
Side effects
- Invalid or unparseable date string returns an error response
- Ambiguous date formats (e.g. 01/02/03) may be rejected or misinterpreted
- Missing date field in POST body returns a validation error
- Dates outside supported range may return an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | string |
Output
Schema · Response
{
"type": "json",
"example": {
"iso_week": 31,
"iso_year": 2026,
"iso_weekday": 1
}
}Tags
x402
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