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Count Finland Working Days

Counts authority-scope working and non-working dates in a range.

When to use

You need an auditable Finland working-day count.

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

Count Finland working days around Independence Day.
Count Finland working days around Midsummer Eve is agreement-dependent.

Formula

for each included date: working_days += status.is_working_day

Normalize endpoints and count exact authority events over the declared weekday baseline.

Inputs

Parameter	Type	Required	Description
`start_date`	date	yes	First date in 2026-2027.
`end_date`	date	yes	Last date in 2026-2027.
`include_start_date`	boolean	default true	Whether start_date participates.
`include_end_date`	boolean	default true	Whether end_date participates.

Outputs

Output	Type	Description
`working_days`	integer	Authority-scope working dates.
`non_working_days`	integer	Weekend and exact authority events.
`public_holidays_counted`	list	Exact events in the range.
`territory`	string	FI (Finland).
`territory_name`	string	Finland
`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

Coverage starts with a published event: {"start_date":"2026-01-01","end_date":"2026-01-01","include_start_date":true,"include_end_date":true} → {"working_days":0,"non_working_days":1}

GET https://tttkmbb.com/api/v1/calculate/finland-public-working-days-between?start_date=2026-01-01&end_date=2026-01-01&include_start_date=true&include_end_date=true

Machine access

API: GET https://tttkmbb.com/api/v1/calculate/finland-public-working-days-between (query parameters) or POST with a JSON body {"inputs": {...}}
Schema: https://tttkmbb.com/api/v1/calculators/finland-public-working-days-between · Markdown: https://tttkmbb.com/everyday/finland-public-working-days-between.md · JSON definition: https://tttkmbb.com/everyday/finland-public-working-days-between.json
MCP: server https://tttkmbb.com/mcp, tool run_calculator with calculator_id="finland-public-working-days-between"
OpenAPI operationId: count_fi_working_days
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

Finland Working Day — Inspect a date and source evidence.