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Re: [O] Incorrect clock duration calculation

From: Thomas Plass
Subject: Re: [O] Incorrect clock duration calculation
Date: Tue, 7 May 2019 21:30:08 +0200

Note that the day starts at 00:00 and ends at 24:00.  So:

Martin Schroeder wrote at 11:07 on May 7, 2019:
: For example, this should produce 2:00 duration:
: CLOCK: [2019-04-19 Fri 22:00]--[2019-04-19 Fri 00:00] => -22:00

It will if you change [2019-04-19 Fri 00:00] to [2019-04-19 Fri 24:00].

: I tried this, but id did not work either:
: CLOCK: [2019-04-19 Fri 22:00]--[2019-04-19 Sat 00:00] => -22:00

Day name abbreviations ("Fri", "Sat") in timestamps are really for
human consumption.  Org doesn't attach a lot of meaning to them.
Hell, since they use a setting from `calendar', they are subject to
localisation.  Note that

[2019-04-19 00:00]
[2019-04-19 Sa 00:00]
[2019-04-19 Sat 00:00]
[2019-04-19 fooble 00:00]

work the same as Org is agnostic about the non-whitespace string
between the date and the time (as long as it doesn't contain
whitespace itself).

: This should produce 3:00 but it gives -21 even though the end time is
: later than start time:
: CLOCK: [2019-04-19 Fri 22:00]--[2019-04-19 Sat 01:00] => -21:00

No, the end time preceeds the start time.  The encoded duration starts
at 1am and ends at 10pm on the same day.  If you want to cross day
boundaries then the dates must be different in the timestamps.
"2019-04-20" is what you want in the second one:

CLOCK: [2019-04-19 Fri 22:00]--[2019-04-20 Sat 01:00] =>  3:00



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