unicode-org/icu release-78.2

ICU 78.2

on GitHub

We are pleased to announce the release of Unicode® ICU 78.2. It updates to CLDR 48.1. These are maintenance releases for ICU 78 and CLDR 48, with limited sets of bug fixes and no API or structural changes.

ICU 78.2 also includes a small number of bug fixes, as well as a minor update for time zone data (tzdata) version 2025c (2025-dec) ICU-23296.

• List of tickets fixed in ICU 78.2

Changes in ICU 78.2:

• C++ ucasemap_setLocale() better handles errors in reading uninitialized memory from a bogus locale ID
• Java & C++ yield the correct long time zone name for Europe/Dublin
• C++ fixes a build issue on the clang-cl compiler related to the 'dllexport' attribute
• C++ fixes a build issue when operator+ on UnicodeString is used with non-ICU code when ICU headers are included
• List of all tickets fixed in ICU 78.2

For details, please see https://unicode-org.github.io/icu/download/78.html.