{"ok":true,"result":{"slug":"business-days-calculator","name":"Business Days Calculator","summary":"Count working days between two dates, or add/subtract working days to a date, skipping weekends and an optional holiday list.","description":"Count working days between two dates, or add business days to a date, skipping weekends (any days you choose) and your own list of public holidays.","method":"POST","endpoint":"/api/v1/tools/business-days-calculator","plan":"free","mcpName":"business_days_calculator","input":{"type":"object","additionalProperties":false,"properties":{"mode":{"type":"string","description":"count: working days from start to end. add: move start by days working days (negative to go back).","default":"count","enum":["count","add"],"maxLength":200000},"start":{"type":"string","description":"Start date as YYYY-MM-DD.","maxLength":10},"end":{"type":"string","description":"For count: end date as YYYY-MM-DD (dates are swapped if end is earlier).","maxLength":10},"days":{"type":"integer","description":"For add: whole number of working days to add (negative to subtract), up to ±50,000. The start date itself is never counted.","minimum":-50000,"maximum":50000},"weekend":{"type":"string","description":"Weekend days as comma-separated numbers, 0 = Sunday … 6 = Saturday. Default \"0,6\" (Saturday and Sunday); \"5,6\" for Friday–Saturday.","default":"0,6","maxLength":20},"holidays":{"type":"string","description":"Holidays to skip, one per line as YYYY-MM-DD optionally followed by a name, e.g. \"2026-12-25 Christmas Day\".","maxLength":20000},"includeStart":{"type":"boolean","description":"For count: include the start date.","default":true},"includeEnd":{"type":"boolean","description":"For count: include the end date.","default":true},"listExcluded":{"type":"boolean","description":"Include the list of skipped weekend days and holidays in the response.","default":false}},"required":["start"]},"example":{"mode":"count","start":"2026-12-01","end":"2026-12-31","holidays":"2026-12-25 Christmas Day\n2026-12-28 Boxing Day (substitute)"},"randomOutput":false,"network":false,"docs":"https://pithlab.com/developers/tools/business-days-calculator","page":"https://pithlab.com/tools/business-days-calculator"}}