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• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for an issue that matches the one I want to file, without success.

Issue Details

The Brazil has recently stopped using summer time. But Electron still works with it!

• Electron Version:
  6.1.4 and probably any Electron 6 and lower
• Operating System:
  Window 10
• Last Known Working Electron version:
  7 and up works

Expected Behavior

The Electron should use system time.

Actual Behavior

The time is one hour ahead since it still counts the Brasilia Summer time.

To Reproduce

Go to time settings on your Windows computer, Change timezone to "(UTC -03:00) Brasilia". Open dev tools and paste "new Date().toTimeString()" to console. The resulting time will be one hour ahead.

Screenshots