# What changed in countries-and-timezones

> 8 changes in countries-and-timezones 3 from its official release notes, upgrade guides and advisories: 4 breaking, 1 new APIs and options. Each one cited. Sources checked 2026-10-24. HTML: https://unstale.sh/npm/countries-and-timezones/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## countries-and-timezones 3

### Breaking changes

- Updated to permanent UTC-06. (3.11.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.11.0)
- Updated to permanent UTC-05, including its aliases. (3.11.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.11.0)
- CST6CDT, EST5EDT, MST7MDT, and PST8PDT are now standalone deprecated zones without country associations. They remain available through getTimezone() and getAllTimezones({deprecated: true}), but are excluded from country timezone lists. (3.11.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.11.0)
- Refreshed Morocco and Western Sahara offsets to permanent UTC. (3.11.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.11.0)

### New APIs and options

- Added Heard Island and McDonald Islands as a country. (3.9.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.9.0)

### Behavior and default changes

- Updated to the 2026c IANA Time Zone Database, which may change time zone data used by the package. (3.10.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.10.0)

### Fixes and other changes

- The country name for NR changed from Nauru to Naoero. (3.11.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.11.0)
- Updated the time zone data to the 2026a IANA Time Zone Database. (3.9.0) — [release notes](https://github.com/manuelmhtr/countries-and-timezones/releases/tag/v3.9.0)