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From: Joel <joelcrump@gmail.com>
Newsgroups: comp.os.linux.advocacy
Subject: Re: Does Dimdows Know What Time It Is?
Date: Tue, 01 Oct 2024 08:26:51 -0400
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DFS <nospam@dfs.com> wrote:
>On 9/28/2024 6:40 PM, Lawrence D'Oliveiro wrote:
>
>> Something Unix did that was different from most other OSes was, its system
>> clock kept time in UTC (or GMT, in pre-UTC days). Linux does the same.
>> When you use a command like “date” to see what the current date and time
>> is, it converts that UTC time to a local time in some specified timezone.
>> Changing the timezone is as easy as specifying a new value for the TZ
>> environment variable.
>> 
>> Windows, on the other hand, keeps its system clock in local time, in some
>> specific time zone that is assumed to apply systemwide.
>> 
>> This is a particularly dumb idea when you realize how much it complicates
>> things if your time zone has daylight saving time. We have seen this sort
>> of thing happen on Windows systems before, where they might forget to
>> adjust the clock to start/stop daylight saving, or even adjust it twice so
>> you end up being an hour off in the opposite direction.
>> 
>> This can’t happen on Linux systems, because there is no turning daylight
>> saving “on” or “off” as such: there is simply a table of local time
>> offsets (from the “tzdata” files), and the correct offset to apply depends
>> only on the actual UTC time value, not on the current setting of any
>> system flag.
>> 
>> This also makes it easy to convert between UTC and local times at any time
>> in the past, for any time zone.
>
>
>I NEVER trust Linux to keep time.  I've encountered several occurrences 
>of it dropping 5-7 minutes over a 1-hour period.
>
>
>* user error
>* Linux is just the kernel
>* RTFM newb
>* Linux is perfect
>* you're lying
>* works for me
>* you have the source code, fix it yourself


Why is something other than the hardware clock determining the system
time, on either OS?

-- 
Joel W. Crump

Amendment XIV
Section 1.

[...] No state shall make or enforce any law which shall
abridge the privileges or immunities of citizens of the
United States; nor shall any state deprive any person of
life, liberty, or property, without due process of law;
nor deny to any person within its jurisdiction the equal
protection of the laws.

Dobbs rewrites this, it is invalid precedent.  States are
liable for denying needed abortions, e.g. TX.