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Re: system time has change while installing

On Wed, Jun 19, 2013 at 01:43:08AM +0400, Maxim Markov wrote:
>    Hello.
>    I use  debian-live-7.0.0-amd64-gnome-desktop.
>    And it has error in Time Zones Settings.
>    System Time changes during installation.
>    It`s possible that date can changes too.
>    for example:
>    when i boot from livecd i change location settings from London to Russia
>    (Asia), Krasnoyarsk
>    and my system time changes from 20:20 to 04:20
>    example2:
>    when i install version to hdd my system time changed from 00:50 to 08:50
>    i suppose that error present in other versions.
>    same problem i noticed in Scientific Linux.
>    i use ROSA Desktop Fresh and looks like it hasn`t error.
>    in my own apinion: date and time must be stay as it set in local pc, while
>    time zones parameters sets in configs.

This isn't actually an error. But perhaps an issue with PC design. The
internal clock of your PC stores a time and date, but it DOESN'T store
which time zone you're in. All it stores is, for example, "20:20".

When you install a new OS, it reads that time and must make one of two
assumtions: Either the time is stored as local time (in which case no
adjustment is necessary, but there may be issues when Daylight Saving
Time comes into effect) or atomic time, UTC (in which case 8 hours must
be added on before displaying the time to the user).

There is no right or wrong answer to which method to use. Linux assumes
the hardware uses UTC, Windows assumes it uses local time. Both can be
configured to use either method
(https://wiki.archlinux.org/index.php/Time#Time_standard) and it's best
if they agree.

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