It's also worth mentioning Argentina,
"Argentina determines whether to observe daylight saving time on a year-by-year basis, and individual provinces may opt out of the federal decision. At present, Argentina does not observe daylight saving time."
"Argentina determines whether to observe daylight saving time on a year-by-year basis, and individual provinces may opt out of the federal decision. At present, Argentina does not observe daylight saving time."
The country is huge and could easily cover more than one timezone, I'd hazard a guess at political reasons based on that, but don't take me as an authority because I'm not