Clocks which are designed to be able to auto set their time in the US will actually also do the auto setting at least as far away as Johannesburg, South Africa.

I know this because when my mother was visiting the US over a decade ago, she found a clock she felt was aesthetically perfect for her psychology practice room at her house.

Twice a year the clock changes its time to be 10 hours (or thereabouts) behind, no doubt due to daylight savings change over.

So she has to readjust the time whenever this happens which she says she doesn’t really mind.