The real catalog of tools for AI agents

U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.

Public holidays (UK, US, DE, FR), tax-year dates and DST switches for 2026-2028.

Free, keyless public holidays lookup for any country and year, plus single-date holiday checks.

China holidays and lunar calendar lookup, solar-to-lunar conversion and yearly schedule.

Government and OpenHolidays calendars: regional scope, multilingual names, dated sources and gaps.

NYSE, Federal Reserve, TARGET2 and UK business days, holidays and T+N settlement dates.

Public holiday data for 30+ countries. Check holidays, working days and calendars via AI assistants.

MCP server for Japanese business days, holidays, and fiscal-period calculations.

Date context for agents: Chinese lunar calendar, solar terms, holidays for 12 regions. Offline.

List, create, update, and delete events in Apple Calendar on macOS.

Public holidays for 100+ countries — by year, or the next ones coming up. Via Nager.Date.

Market seasonality by day, window and month for S&P 500, Nasdaq, Dow, Bitcoin, gold and oil.

Holidays MCP — wraps Nager.Date API (free, no auth)

Turn any goal with a deadline into a private, gamified, evidence-based execution calendar.

Nager and Open Holidays public holidays.

Outlook.com, Microsoft 365, Google calendars: free time, events, invitations, booking pages, polls.

Chinese almanac: lunar calendar, BaZi 八字, daily 宜忌, lucky-day picker, public holidays.

Google Calendar MCP Pack

Read and search Teamup Calendar events and sub-calendars; create, update, delete and undo events.

The Boston Calendar MCP.