Intl Locale Info API is a new Stage ECMAScript TC39 proposal to enhance the Intl.Locale object by exposing Locale information, such as week data (first day in a week, weekend start day, weekend end day, minimun day in the first week), and text direction hour cycle used in the locale. https://github.com/tc39/proposal-intl-locale-info
Docs: https://docs.google.com/document/d/1OwEsvs8VQwvR-ug01xLyIwpgcvUfaP24u9owc7aBKJ4 Update slides for TC39 2021-Dec-15 https://docs.google.com/presentation/d/1PZ0_WiE9PNInY2bgyHGJH0DbKd0PKL9RApXxVPKJjUY