check_de_working_day

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Use this when you need a deterministic Germany Germany nationwide statutory public holidays for 2026 result. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when state, municipal, school, bank, TARGET, transport-system, collective-agreement and employer-specific schedules are not inferred. What it computes: Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2026 authority events. Example user requests: Germany: German Unity Day. | Germany: Ordinary weekday. Inputs: date (date). Complete JSON argument examples: {"date":"2026-10-03"} | {"date":"2026-10-13"} Outputs: territory, territory_name, weekday, is_working_day, day_type, holiday_names, holiday_kinds, holiday_details, calendar_scope, holiday_policy, substitute_day_policy, calendar_profile, dataset_version, sources. Formula: is_working_day = not an official Saturday/Sunday weekend date and no exact authority event Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/germany-national-working-day with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/everyday/germany-national-working-day.md