# Finland Working Day

> Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2027 authority events.

- Calculator id: `finland-public-working-day` · Category: Everyday Life (`everyday`) · Tool name: `check_fi_working_day`
- Canonical page: https://tttkmbb.com/everyday/finland-public-working-day · This document: https://tttkmbb.com/everyday/finland-public-working-day.md · JSON definition: https://tttkmbb.com/everyday/finland-public-working-day.json

## Purpose

Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2027 authority events.

**Use when:** You need a deterministic Finland Finland nationwide church and national full-day public holidays for 2026-2027 result.

**Do not use when:** Nationwide full-day public-holiday layer only. Midsummer Eve, Christmas Eve, employer, collective-agreement, sector, school, bank, Åland, Sámi and local closures are not inferred; private-sector annual-leave counting may treat Saturdays and certain eves differently.

## Example user requests

- Finland: Independence Day.
- Finland: Midsummer Eve is agreement-dependent.


## Input

| Parameter | Type | Unit | Required | Description |
| --- | --- | --- | --- | --- |
| `date` | date |  | required | Gregorian date in Finland coverage. |

## Output

| Field | Type | Unit | Description |
| --- | --- | --- | --- |
| `territory` | string |  | FI (Finland). |
| `territory_name` | string |  | Finland |
| `weekday` | string |  | Gregorian weekday. |
| `is_working_day` | boolean |  | Monday-Friday with no event in this pinned authority scope. |
| `day_type` | string |  | Deterministic classification: official_weekend, regular_workday, or the first published authority event kind. |
| `holiday_names` | string_list |  | Events applying on the date. |
| `holiday_kinds` | string_list |  | Authority event classifications. |
| `holiday_details` | list |  | Structured event details, including partial-day notes where published. |
| `calendar_scope` | string |  | Finland nationwide church and national full-day public holidays for 2026-2027 |
| `holiday_policy` | string |  | Finnish church and national public holidays are included; Midsummer Eve and Christmas Eve are not treated as nationwide statutory full-day holidays because their paid-day status is commonly agreement-dependent. |
| `substitute_day_policy` | string |  | No nationwide substitute-day closure is inferred when a public holiday falls on a weekend. |
| `calendar_profile` | string |  | finland-public-holidays |
| `dataset_version` | string |  | fi-nationwide-public-holidays-2026-2027.1 |
| `sources` | list |  | Authority and legislation sources. |

## Formula

`is_working_day = not an official Saturday/Sunday weekend date and no exact authority event`

Apply the pinned authority event table over the declared weekday baseline; do not infer uncovered employer or regional schedules.

## Data Sources

- University of Helsinki Almanac Office – Flag days and public holidays — https://almanakka.helsinki.fi/en/flag-days-and-holidays (university_authoritative_calendar)
- Bank of Finland – Bank holidays — https://www.suomenpankki.fi/en/money-and-payments/bank-holidays/ (central_bank_official_calendar)
- Finlex – Annual Holidays Act 162/2005 — https://finlex.fi/en/legislation/translations/2005/eng/162 (government_legal_text)

Data freshness: `static`. Refresh after the Finland authority publishes a new schedule.

## API

- `GET https://tttkmbb.com/api/v1/calculate/finland-public-working-day?date=…`
- `POST https://tttkmbb.com/api/v1/calculate/finland-public-working-day` with JSON body `{"inputs": {…}}`
- Response: unified envelope (`success`, `request`, `result.values`, `result.units`, `sources`, `freshness`, `timestamp`, `next_actions`, `links`); see https://tttkmbb.com/docs/response-format.md
- Schema: https://tttkmbb.com/api/v1/calculators/finland-public-working-day · OpenAPI operationId `check_fi_working_day` in https://tttkmbb.com/openapi.json
- Authentication: none. Rate limit: fair use, see https://tttkmbb.com/docs/rate-limits.md.

## MCP

- Server: `https://tttkmbb.com/mcp` (Streamable HTTP, JSON-RPC 2.0, no auth)
- Tool:  `run_calculator` with `{"calculator_id": "finland-public-working-day", "inputs": {…}}`

## Example

- Independence Day: inputs `{"date":"2026-12-06"}` → `{"is_working_day":false,"day_type":"public_holiday"}`
- Midsummer Eve is agreement-dependent: inputs `{"date":"2026-06-19"}` → `{"is_working_day":true,"day_type":"regular_workday"}`

```
GET https://tttkmbb.com/api/v1/calculate/finland-public-working-day?date=2026-12-06
```

## Limitations

Nationwide full-day public-holiday layer only. Midsummer Eve, Christmas Eve, employer, collective-agreement, sector, school, bank, Åland, Sámi and local closures are not inferred; private-sector annual-leave counting may treat Saturdays and certain eves differently. Apply the pinned authority event table over the declared weekday baseline; do not infer uncovered employer or regional schedules. All values are computed from the formula above; no measurement or live data is involved.

## FAQ

**Are Midsummer Eve and Christmas Eve nationwide statutory full-day holidays?**

No. They are paid days for a large part of the population under collective agreements, but this package does not infer them as universal nationwide full-day closures.

## Related

- [Add Finland Working Days](https://tttkmbb.com/everyday/finland-public-add-working-days.md) — Offset through the same authority package.