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Timezone Overlap Hours Calculator
x402
Timezone Overlap Hours Calculator is a paid API for AI agents from timezone-convert.x402supply.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-18).
Calculates working-hours overlap across 2–10 IANA time zones on a given date, returning per-zone UTC offsets, abbreviations, DST flags, and the overlapping window (if any).
Price / call$0.005
Success—
StatusUnknown
How this service works
Converts a local time in one IANA zone to up to 20 target zones. Returns local time, UTC offset, abbreviation and DST flag per target, and flags nonexistent or ambiguous local times at DST transitions.; Returns a zone's current UTC offset and abbreviation, whether it observes DST, standard and DST o
Output
A JSON object containing: per-zone breakdown of work window in local and UTC time, UTC offset, DST flag, and timezone abbreviation; a top-level overlap object with overlapStart/overlapEnd in UTC and local time per zone; overlapMinutes integer; hasOverlap boolean; and a warnings array flagging DST transitions or ambiguous times.
Example use cases
Global team standup scheduling
“Find the overlapping work hours on 2025-09-15 between America/Los_Angeles, Europe/Berlin, and Asia/Singapore, assuming everyone works 9am to 6pm local time. Is there any window where all three offices can meet?”
Remote hiring interview timing
“I need to schedule an interview on 2025-11-03 between a candidate in America/Chicago and an interviewer in Australia/Sydney. Both work 9am to 5pm — is there any overlapping window?”
Cross-timezone client call finder
“What's the working-hours overlap on 2026-01-20 between our London office (Europe/London) and our New York office (America/New_York), with work hours from 8am to 6pm? I want to know the exact UTC window when both are available.”
Technical details
Endpoint
POSThttps://timezone-convert.x402supply.com/tools/overlap_hours?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to compute the actual overlapping working-hours window across multiple IANA time zones on a specific calendar date, especially when DST correctness matters. Prefer it over manual UTC offset arithmetic or generic timezone converters when you need a structured, machine-readable overlap result with DST flags and per-zone UTC-stamped work windows.
Side effects
- Invalid IANA zone name returns an error or warning
- Fewer than 2 or more than 10 zones causes validation failure
- Date not in YYYY-MM-DD format rejected by pattern validation
- workEnd before or equal to workStart causes an error
- No overlap exists — returns hasOverlap: false with overlapMinutes: 0 and null overlap fields
- DST transition edge cases flagged in warnings array but still processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | string | Calendar date YYYY-MM-DD, evaluated as that date in each zone |
| zones | string | Comma-separated IANA zones, 2-10, e.g. America/New_York,Europe/London |
| workEnd | string | Working day end HH:mm, default 17:00. Must be after workStart |
| workStart | string | Working day start HH:mm, default 09:00 |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-10-09",
"zones": [
{
"zone": "America/New_York",
"isDst": true,
"workEnd": "2026-10-09T17:00:00-04:00",
"utcOffset": "-04:00",
"workStart": "2026-10-09T09:00:00-04:00",
"overlapEnd": null,
"workEndUtc": "2026-10-09T21:00:00.000Z",
"abbreviation": "EDT",
"overlapStart": null,
"workStartUtc": "2026-10-09T13:00:00.000Z"
},
{
"zone": "Europe/London",
"isDst": true,
"workEnd": "2026-10-09T17:00:00+01:00",
"utcOffset": "+01:00",
"workStart": "2026-10-09T09:00:00+01:00",
"overlapEnd": null,
"workEndUtc": "2026-10-09T16:00:00.000Z",
"abbreviation": "BST",
"overlapStart": null,
"workStartUtc": "2026-10-09T08:00:00.000Z"
},
{
"zone": "Asia/Kolkata",
"isDst": false,
"workEnd": "2026-10-09T17:00:00+05:30",
"utcOffset": "+05:30",
"workStart": "2026-10-09T09:00:00+05:30",
"overlapEnd": null,
"workEndUtc": "2026-10-09T11:30:00.000Z",
"abbreviation": "IST",
"overlapStart": null,
"workStartUtc": "2026-10-09T03:30:00.000Z"
}
],
"source": [
"https://www.iana.org/time-zones"
],
"overlap": null,
"workEnd": "17:00",
"warnings": [],
"workStart": "09:00",
"hasOverlap": false,
"overlapMinutes": 0
}
}Tags
x402
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