On 2026-01-16 18:45, Berthold Stoeger via subsurface wrote:
On Freitag, 16. Jänner 2026 16:15:59 Ostindonesische Zeit Benjamin via
subsurface wrote:
Some of us live in countries where the DST transition changes every
year
for "reasons", and then you get the lovely corner case of needing to
keep
these historical changes, so that you can see when exactly you are
adding
or subtracting that rather useless extra hour to your date/time.
I don't see the problem. You just save GMT+x at the time of the dive.
That's
precisely what my old dive computer stored.
It appears to be a bit of a project, but I don't see the fundamental
problem
in adding a "std::optional<int> gmt" field to struct dive. An unset
value
means "don't know" a value in the range -12 -> +14 gives a known
offset. One
obviously has to think about the semantics of the time when the field
is set.
That's the kind of first step I was thinking. Just store the data if we
have it. We don't have to commit to any irreversible change, we just
need to not discard data which we did have to have every possible option
remain available to us.
Ron
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