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Finland Working Day

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

When to use

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.

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.

Inputs

Parameter	Type	Unit	Required	Description
`date`	date		yes	Gregorian date in Finland coverage.

Outputs

Output	Type	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.

Example

Independence Day: {"date":"2026-12-06"} → {"is_working_day":false,"day_type":"public_holiday"}

Midsummer Eve is agreement-dependent: {"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

Machine access

API: GET https://tttkmbb.com/api/v1/calculate/finland-public-working-day (query parameters) or POST with a JSON body {"inputs": {...}}
Schema: https://tttkmbb.com/api/v1/calculators/finland-public-working-day · Markdown: https://tttkmbb.com/everyday/finland-public-working-day.md · JSON definition: https://tttkmbb.com/everyday/finland-public-working-day.json
MCP: server https://tttkmbb.com/mcp, tool run_calculator with calculator_id="finland-public-working-day"
OpenAPI operationId: check_fi_working_day
Freshness: static. Authentication: none. Rate limit: fair use (see rate limits).

Sources

University of Helsinki Almanac Office – Flag days and public holidays (university_authoritative_calendar)
Bank of Finland – Bank holidays (central_bank_official_calendar)
Finlex – Annual Holidays Act 162/2005 (government_legal_text)

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 calculators

Add Finland Working Days — Offset through the same authority package.