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Add Spain Working Days

Adds or subtracts Spain authority-scope working days in exact coverage.

When to use

You need a deterministic Spain working-day offset.

Do not use when: The remaining national, autonomous-community, Ceuta/Melilla and up to two municipal local holidays require a jurisdiction-specific calendar.

Example user requests

Add or subtract Spain working days around National Day.
Add or subtract Spain working days around Ordinary weekday.

Formula

move one day at a time; decrement only on status.is_working_day=true

Skip Saturday/Sunday and exact pinned authority events; do not add unverified substitute days.

Inputs

Parameter	Type	Unit	Required	Description
`start_date`	date		yes	Gregorian start date in 2026-2026.
`working_days`	integer		yes	Signed offset; start date excluded for non-zero offsets. Range: ≥ -1000, ≤ 1000

Outputs

Output	Type	Description
`start_date`	date	Input date.
`result_date`	date	Date reached.
`working_days_added`	integer	Signed requested offset.
`calendar_days_elapsed`	integer	Signed Gregorian difference.
`public_holidays_skipped`	list	Exact events crossed.
`territory`	string	ES (Spain).
`territory_name`	string	Spain
`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	Spain nationwide national non-substitutable labour holidays for 2026
`holiday_policy`	string	Only national non-substitutable holidays from the BOE calendar are included; autonomous-community and local holidays are not inserted.
`substitute_day_policy`	string	Autonomous-community substitution choices and local compensatory arrangements are not inferred.
`calendar_profile`	string	spain-national-holidays
`dataset_version`	string	es-national-holidays-2026.1
`sources`	list	Authority and legislation sources.

Example

Zero offset is identity: {"start_date":"2026-01-01","working_days":0} → {"result_date":"2026-01-01","working_days_added":0}

GET https://tttkmbb.com/api/v1/calculate/spain-national-add-working-days?start_date=2026-01-01&working_days=0

Machine access

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

Sources

BOE – Resolution of 17 October 2025: 2026 labour holidays (government_calendar_reference)
BOE – Royal Decree 2001/1983 (government_law)
Ministry of Labour and Social Economy – labour guide (government_guidance)

FAQ

Does this answer every Spanish region and municipality?

No. It is the nationwide non-substitutable subset only; autonomous-community, Ceuta/Melilla and local holidays require a jurisdiction-specific official calendar.

Related calculators

Spain Working Day — Inspect a date and source evidence.