GeoNames Forum

Chile needs a new timezone for the Aysén region.
It is named America/Coyhaique

https://github.com/eggert/tz/blob/main/NEWS

News for the tz database

Release 2025b - 2025-03-22 13:40:46 -0700

Briefly:
New zone for Aysén Region in Chile which moves from -04/-03 to -03.

Changes to future timestamps

Chile's Aysén Region moves from -04/-03 to -03 year-round, joining
Magallanes Region. The region will not change its clocks on
2025-04-05 at 24:00, diverging from America/Santiago and creating a
new zone America/Coyhaique. (Thanks to Yonathan Dossow.) Model
this as a change to standard offset effective 2025-03-20.