In Chile the case is very particular as the days of daylight saving changes are different a year from another...
Is there a function to get for given day at given UTC time the UTC offset?
I saw on a Suse documentation that something like zdump -v /usr/share/zoneinfo/Chile/Continental
makes me enable to get all changings through years, but the job has to be done still... any command to do that?
Or/and is there a function with a given date and time from given timezone to UTC? And its reverse?
How does linux handle these changes? didn't find more documentation than Suse one.