check_sa_working_day

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Use this when you need a deterministic Saudi Arabia Saudi Central Bank financial institutions 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 financial-institution scope only. MHRSD business-sector leave, RTGS-specific intervals, government offices, private-employer rosters, Hajj-season branch exceptions and Umm al-Qura forecasts are not inferred. What it computes: Checks a date against the Friday-Saturday weekend baseline and exact 2026-2029 authority events. Example user requests: Saudi Arabia: SAMA Eid Al-Fitr interval. | Saudi Arabia: Friday/Saturday weekly baseline. | Saudi Arabia: National Day Saturday substitution. Inputs: date (date). Complete JSON argument examples: {"date":"2026-03-17"} | {"date":"2026-01-02"} | {"date":"2028-09-24"} 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 Friday/Saturday weekend date and no exact authority event Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/saudi-financial-working-day with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/everyday/saudi-financial-working-day.md