The Unicode support library, International Components for Unicode (ICU), is upgraded from version 74.2 to version 77.1, adding support for Unicode 16 and updating locale data. Two changes could pose some risk for web applications that assume a specific format from the [Intl](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Internationalization) JS APIs: 1. The default Italian number formatting changed to omit the thousand separator for 4-digit numbers. For example, `new Intl.NumberFormat("it").format(1234)` will return `1234` instead of `1.234`. The old behavior can be achieved with the `useGrouping` parameter for the `Intl.NumberFormat` constructor. 2. In some English locales (en-AU, en-GB, and en-IN), a comma was added after full-length weekdays, for example, changing Saturday 30 April 2011 to Saturday, 30 April 2011. Web applications should avoid relying on the precise formatting of dates and they may change again in future.
Docs: https://unicode-org.github.io/icu/download/77.html https://cldr.unicode.org/downloads/cldr-47 https://www.unicode.org/versions/Unicode16.0.0