Count working days between any two dates, excluding weekends and that country's public holidays. The same engine that powers our MCP server — 206 countries, years 1900–2100, no signup. Public-holiday data is curated for 2020–2030; outside that window we subtract weekends and known fixed/computed-Easter holidays only (lunar holidays without curated dates are honestly omitted).
Pick any of 206 countries and we subtract that country's national holidays (and joint cuti bersama, in Indonesia's case) from the date range. Holidays that fall on a Saturday or Sunday are ignored — they don't reduce working days because the weekend already excluded them.
Same engine that powers the caldays MCP server (mcp.caldays.com). Date inputs accept any range 1900–2100. Public-holiday data is curated 2020–2030 from official government sources (SKB 3 Menteri for Indonesia, OPM for the US, gov.uk for the UK, etc.). Outside that window we subtract weekends plus algorithmically known holidays (fixed dates, nth-weekday rules, Easter via the Computus). Lunar holidays without curated dates are honestly omitted — we never fake an Eid or a Chinese New Year date.
Limitation in v1: weekends are Saturday–Sunday for every country. Countries with a Friday–Saturday weekend (Saudi Arabia, UAE, Egypt, Israel) are NOT yet supported as a different weekend pattern — we'll add this soon.