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Add a note on the sign of daylight-saving offsets

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Given that at least one zone has a negative offset (so that it's in
standard time for most of the year, including summer, and
daylight-saving time relatively briefly during winter), QTimeZone's
docs should explain what that means.

Change-Id: I6649b4cdefbd685dc97bf85d957960da44d07aed
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
This commit is contained in:
Edward Welbourne 2021-11-12 11:49:29 +01:00
parent b9021ed1f7
commit 8dea25d501
1 changed files with 4 additions and 1 deletions
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5
src/corelib/time/qtimezone.cpp
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@ -209,7 +209,10 @@ Q_GLOBAL_STATIC(QTimeZoneSingleton, global_tz);
standard time in the time zone. The daylight-saving time offset is the
number of seconds to add to the standard time offset to obtain
daylight-saving time (abbreviated DST and sometimes called "daylight time"
or "summer time") in the time zone.
or "summer time") in the time zone. The usual case for DST (using
standard time in winter, DST in summer) has a positive daylight-saving
time offset. However, some zones have negative DST offsets, used in
winter, with summer using standard time.
Note that the standard and DST offsets for a time zone may change over time
as countries have changed DST laws or even their standard time offset.