Re: [O] Bug: org-2ft and/or float-time is wrong [9.1.2 (9.1.2-22-ga2a034-elpaplus @ ~/.emacs.d/elpa/org-plus-contrib-20171023/)]

[Nicolas Goaziou]

Hello,

Allen Li <address@hidden> writes:

> Alas, I still can't seem to find the original DST bug.  I'm not sure
> using UTC solves DST problems.
>
> For example, in the timezone America/Los_Angeles,
>
> <2017-11-05 01:00:00> -> <2017-11-05 04:00:00> = 4 hours
> <2017-10-10 01:00:00> -> <2017-10-10 04:00:00> = 3 hours
> <2017-03-12 01:00:00> -> <2017-03-12 04:00:00> = 2 hour
>
> This is what Emacs gives me using the default time zone
>
> <2017-11-05 01:00:00> -> <2017-11-05 04:00:00> = 4 hours
> <2017-10-10 01:00:00> -> <2017-10-10 04:00:00> = 3 hours
> <2017-03-12 01:00:00> -> <2017-03-12 04:00:00> = 2 hour
>
> This is what Emacs gives me using UTC
>
> <2017-11-05 01:00:00> -> <2017-11-05 04:00:00> = 3 hours
> <2017-10-10 01:00:00> -> <2017-10-10 04:00:00> = 3 hours
> <2017-03-12 01:00:00> -> <2017-03-12 04:00:00> = 3 hours
>
> Using UTC seems strictly wrong to me.

You're right. Using UTC doesn't solve any DST bug, despite what
I initially thought. I think we just need to remove the whole set of
changes about UTC in `parse-time-string'. We also need to adapt tests in
test-org-clock since the same time difference could have different
meanings depending on the time zone. I can do that later, if no one
objects. WDYT?n

Refactoring time functions in Org is still useful, though.

Regards,

-- 
Nicolas Goaziou