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Week Number & Date Details Lookup
x402
Week Number & Date Details Lookup is a paid API for AI agents from timezone-time.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Returns ISO 8601 week number, week year, day of year, quarter, weekday name, and leap-year status for a given date.
Price / call$0.02
Success—
StatusUnknown
How this service works
ISO 8601 week number and week year, day of the year, quarter, weekday and leap-year status for a date.
Output
Returns a JSON object with the ISO week number (isoWeek), ISO week year (isoWeekYear), a formatted label like 'W03-2025' (isoWeekLabel), the day of year (dayOfYear), total days in the year (daysInYear), days remaining in the year (daysLeftInYear), the fiscal quarter (quarter), the weekday name (weekday), and a boolean leap year flag (leapYear), plus a human-readable summary. If no date is provided, defaults to today in UTC.
Example use cases
Project sprint week numbering
“What ISO week number and week year does 2025-01-06 fall in? I need it for labeling our sprint.”
Fiscal quarter classification
“Which quarter does November 15th 2025 fall in, and what weekday is it?”
Leap year and days-remaining check
“Is 2024 a leap year, and how many days are left in the year after October 10th 2024?”
Technical details
Endpoint
GEThttps://timezone-time.x402tookit.com/week-number?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need ISO 8601 week metadata, day-of-year position, quarter classification, or leap-year determination for a specific date, particularly in scheduling, reporting, or calendar-aware workflows. It is purpose-built for date attribute lookups and returns multiple properties in a single call, avoiding the need to compute these values client-side.
Side effects
- Invalid date format returns an error — must be YYYY-MM-DD
- Dates outside supported range may return null fields
- Missing date parameter defaults to today UTC, which may be unexpected for non-UTC callers
- Degraded mode may return partial results with a degraded flag set to true
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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