check_be_working_day

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Use this when you need a deterministic Belgium Belgium ten statutory private-sector public holidays for 2026-2027 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 private-sector statutory core only; substitute dates, public-service/community/regional holidays, sector agreements, employer, school, bank and municipal schedules are not inferred. What it computes: Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2027 authority events. Example user requests: Belgium: Belgian National Day. | Belgium: Ordinary weekday. Inputs: date (date). Complete JSON argument examples: {"date":"2026-07-21"} | {"date":"2026-07-22"} 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/belgium-public-working-day with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/everyday/belgium-public-working-day.md