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Business Day Offset Calculator
Find a date after a signed business-day offset using your weekend and holiday policy.
Starting date, Business days, Weekend ISO weekdays JSON, Holiday dates, one per line
business-day-offset-calculator.json (complete report)
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter values using the examples, or choose a local file where requested. Follow the displayed supported input shapes and limits.
- Choose Calculate result and inspect the complete result.
- Download result to save the primary file. Where supplied, additional links save source files and the full JSON report. Reset restores examples and clears output.
Examples
Starting date: 2026-10-23
Business days: 1
Weekend ISO weekdays JSON: [6,7]
Holiday dates, one per line:
Limitations
- UTC civil dates only; explicitly supplied weekend days and at most2000 unique holiday dates. Exclude the starting day when offset is nonzero; zero returns the start unchanged. Signed offset up to10000 and traversal budget50000 days. No inferred jurisdictional holiday policy.
- Text fields are limited to100,000 UTF16 units each and400,000 combined UTF8 bytes; file fields have their own displayed limits. Combined output is at most4MiB. Processing stops after30 seconds; tool-specific bounds may be tighter.
- Generated source is a downloadable result and is not executed here. Inspection does not establish remote behavior, trust or standards certification.
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