Before every Chinese New Year, backend developer groups see the same question:
"Is February 14th a workday or not?"
The answer: Yes, it's a workday. It's a "调休补班" — a Saturday, but you have to go to the office.
The Problem
Mainstream holiday APIs (Calendarific, HolidayAPI.com, Abstract API, Nager.Date) all cover 200+ countries' public holidays. But they share one blind spot when it comes to China:








