check_kr_working_day

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Use this when you need a deterministic South Korea South Korea statutory public holidays and public-office substitute 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 the package covers the 2026 statutory/public-office schedule only; private-employer, school, bank, exchange, local-government and 2027 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: South Korea: New Labor Day public holiday. | South Korea: Published substitute holiday. Inputs: date (date). Complete JSON argument examples: {"date":"2026-05-01"} | {"date":"2026-10-05"} 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/south-korea-public-working-day with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/everyday/south-korea-public-working-day.md