holiday-calendar
holiday-calendar is a standardized JSON dataset providing official holiday and working calendar information for multiple regions, including China and Japan. It contains data on statutory public holidays and make-up workdays required due to holiday adjustments, sourced directly from official government announcements like the Chinese State Council and Japanese Cabinet Office. The package supports data coverage from 2000 to 2026, depending on the region. It offers an easy-to-integrate API for Node.js applications and allows direct access to raw JSON files via CDN links like unpkg or jsDelivr. Key features include methods to retrieve holiday indexes, fetch specific date details, query all dates for a given year, and filter results by type or date range. Developers can use built-in functions to determine if a specific date is a workday or a holiday, effectively handling complex national scheduling rules where weekends may be shifted. The library is critical for applications requiring accurate calendar logic, such