Japan & World Public Holidays
Public holidays, business days and long weekends for Japan (Cabinet Office) and 245 other countries.
Connect it
Settings → Connectors → Add custom connector
URL: https://holiday.omikuji.dev/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://holiday.omikuji.dev/mcp{
"mcpServers": {
"holiday": {
"url": "https://holiday.omikuji.dev/mcp"
}
}
}claude mcp add --transport http holiday https://holiday.omikuji.dev/mcp{
"servers": {
"holiday": {
"type": "http",
"url": "https://holiday.omikuji.dev/mcp"
}
}
}4 tools, verified live
check_datesread-onlyFor each date, tell whether it is a Japanese national holiday (with name and kind: 祝日 / 振替休日 / 国民の休日), a weekend, and a business day. Also returns today in Japan time. With country, the same for that country (holiday names, status, make-up workdays such as China's 调休).
list_holidaysread-onlyList Japanese national holidays for a year, or between from and to. With no arguments, lists the next 10 holidays from today (Japan time). With country, lists that country's public holidays (and make-up workdays, if any).
business_daysread-onlyCount business days between start and end (inclusive), or find the date that is N business days after start (add=N; negative N goes backward; start itself is not counted). Business day = weekday that is not a national holiday. Set year_end_closed to also skip 12/29-1/3. With country, uses that country's weekend days, holidays and make-up workdays.
find_long_weekendsread-onlyFind 連休 (3+ consecutive days off made of weekends and national holidays), e.g. Golden Week, Silver Week. Give a year, or from (default today) to list upcoming ones. With country, the same for that country.
Alternatives in Other
Compare →KMKolmo MCP ServerB
WA permit rules (city + state baseline, cited), parcel zoning, L&I checks, Seattle estimates & ROI
FSFabrica (Sepolia testnet)B
Fabrica test properties on Sepolia: try every Fabrica tool with no real-world effect.
TYTypeformOfficialB
Build and edit forms, manage automations and contacts, and analyze responses.
RHRhylthymeB
Real-time multi-track schedules for cooking, lab protocols, events and workouts. Validate and share.
ATAtlasB
The world railway atlas as MCP tools: notable train routes, night trains, journey times.
CICircleCIOfficialB
CircleCI's MCP server: inspect projects, runs, workflows, jobs, logs, tests, and artifacts.