The locale data based on the Unicode Consortium's CLDR has been upgraded to version 48. Besides the usual addition of new locale data and translation changes, there are notable changes from the upstream CLDR, affecting Date/Time/Number formattings:

CLDR-16439 zone alias South_Pole was moved to McMurdo, so remove it from Auckland (#4592)
CLDR-16665 key/type core values (#4577)
CLDR-13688 Correct the first day of week for Iceland from Monday to Sunday (#4379)
CLDR-18464 Add a Before Hijrah era to the Islamic calendars (#4581)
CLDR-18572 Add more European Englishes (#4645)
CLDR-18253 Add en_JP (#4634)
CLDR-18603 Add GyM, GyMEd availableFormats to root, en (#4679)
CLDR-18538 root,en: change H patterns without m[s] to add literal 'h' (#4708)
CLDR-9814 Recover Turkey metazone names (#4741)
CLDR-18788 Fix Russian metazones (#4833)
CLDR-13542 Fix Swiss grouping separator (#5019)

Note that locale data is subject to change in a future release of the CLDR. Although not all locale data changes affect the JDK, users should not assume stability across releases. For more details, please refer to the [Unicode Consortium's CLDR release notes](https://cldr.unicode.org/index/downloads/cldr-48) and their [locale data deltas](https://unicode.org/cldr/charts/48/delta/index.html).