On Mar 22, 2025, at 8:53 PM, Hugo Ortiz via tz <tz@iana.org> wrote:
The local goberment of Paraguay stabloshed the GMT-3 time zone for paraguay without no more changes on timezone.
And the IANA database maintainers released the 2025a release on 2025-01-16; that release updates the rules for Paraguay to reflect the government's changes.
Since the 00:00 of 23/03 time zone shifted to GMT-4 on many devices.
Those devices have not yet updated to the current version of the IANA database; the IANA database maintainers do not control when device suppliers update their devices, and those suppliers have had since 2025-01-16 - more than two months ago - to update their devices. I suggest that you contact the suppliers of devices that switched to UTC-4 on 2025-03-23 and tell them that they should update those devices to the current version of the IANA database, 2025b.