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Is Japan & World Public Holidays reliable?

Reliable (measured) Yes. Faceabot measured Japan & World Public Holidays 13 times: 100% of checks succeeded, including the last 13 in a row (last check 2026-10-19 14:05 UTC). It also does the job: its real read-only task worked 13 of 13 times.

Last check: 2026-10-19 14:05 UTC · answered in 5802 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Public holidays, business days and long weekends for Japan (Cabinet Office) and 245 other countries.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.1.0 · publisher website
Connect your agent
{
  "mcpServers": {
    "holiday": {
      "url": "https://holiday.omikuji.dev/mcp"
    }
  }
}
Or ask Faceabot first: MCP tool check_reliability {"id":"dev.omikuji/holiday"} on https://faceabot.com/api/mcp.
Does it actually do the job?

Does the job (tested) — Faceabot asked find_long_weekends to do a small read-only task 13 time(s): 13 returned a real result, the last 13 in a row. Last result: ok in 2476 ms.

Sample input: {}. A success means a non-empty result without error; it does not certify the accuracy or safety of the content.
Other proven tools for the same job

WorkdayAPI Reliable (measured) · 100%
Business-day and public-holiday math for 29 countries: add business days, days between, holidays. · https://workdayapi.mike-tusa.workers.dev/mcp

Business Days Reliable (measured) · 100%
Public holidays and working-day maths for 200+ countries, cross-checked across three providers. · https://tools.profitpather.com/days/mcp

Business Day Calendars Reliable (measured) · 100%
NYSE, Federal Reserve, TARGET2 and UK business days, holidays and T+N settlement dates. · https://business-days.quietworklabs.workers.dev/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…
Faceabot measurements
WhenAnswersReal taskLatency
2026-10-19 14:05 UTC✅ ok✅ done5802 ms
2026-10-18 22:25 UTC✅ ok✅ done5672 ms
2026-10-18 08:15 UTC✅ ok✅ done4686 ms
2026-10-18 00:25 UTC✅ ok✅ done4512 ms
2026-10-17 16:15 UTC✅ ok✅ done6279 ms
2026-10-17 08:15 UTC✅ ok✅ done4180 ms
2026-10-17 00:20 UTC✅ ok✅ done3441 ms
2026-10-16 17:10 UTC✅ ok✅ done5180 ms
2026-10-16 10:10 UTC✅ ok✅ done5677 ms
2026-10-16 03:15 UTC✅ ok✅ done5927 ms
2026-10-15 20:25 UTC✅ ok✅ done4742 ms
2026-10-15 13:36 UTC✅ ok✅ done6950 ms
2026-10-15 07:00 UTC✅ ok✅ done4743 ms
Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

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MCP endpoint : https://color.omikuji.dev/mcp · website · measurements and details
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MCP endpoint : https://shiritori.omikuji.dev/mcp · website · measurements and details

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Publisher of Japan & World Public Holidays?

Show your measured reliability on your README or website:

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Data in JSON: /api/catalog?id=dev.omikuji/holiday · Stop probes: POST /api/reliability/opt-out

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