What will happen to the timings of Scheduled playlists when Summer Time kicks in?

I'm in a country that does not adopt Daylight Saving Time, but my host is in a country that does.

In Configure Server > Stream > Time Zone

I've selected GMT +8

Are these zones literally correct (i.e. always relative to GMT which doesn't change), or are they merely an offset from the server's local time, which might allow for summer time? What about in the new version?