Browser-based tool
Fast date difference plus work-calendar-aware calculations. All core logic runs locally in your browser.
When advanced mode is off, calculations stay date-only (same as previous version).
0 custom dates
Difference, business-day add/subtract, deadline, D-day, and stay calculations with optional work calendar settings.
Core calculations and built-in holiday lookups run locally. Share links store only calculator state, not files or message contents.
No for the current calculator flow. Holiday data is bundled locally, and the page should explicitly disclose any future network-dependent feature before use.
A business day is not a selected weekly off day, not a holiday, and not a custom closure date.
The tool keeps the state local and offers Copy config JSON as a fallback so you can still share or archive the setup.