Tony Finch wrote:
India is a prominent example of a half hour timezone offset.
(Sorry for straying off topic.)
Indeed. I reset the second clock on my phone to the timezone of New
Delhi when my daughter had a semester in Dharamsala. It's been a
couple of years and I've never set it back.
It is precisely the fact of a international civil timescale that makes
the timezone system work. In return, the many timezones and numerous
special cases represent constraints on the common underlying standard
to better track mean solar time.
(Not off topic at all.)
Rob
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