[phobos] Status of std.gregorian

[Shin Fujishiro]

Jonathan M Davis <jmdavisprog at gmail.com> wrote:
> In any case, ideally, whatever we do for time/date in Phobos is in UTC 
> internally and properly handles conversions to other timezones upon request, but 
> it isn't ever actually in another timezone internally.

Thank you for the detailed description!  Now I convinced that the
time value must be held in UTC always.

Then, if I understand correctly, the time object must hold a UTC time
value alongside timezone information.

struct Time
{
    ulong utc;
    Timezone tz;
}

... and timezone conversions are done by just replacing the tz member.


Shin