Calendar Types

Aaron Denney wnoise at
Tue Feb 15 09:22:24 EST 2005

On 2005-02-15, Keean Schupke <k.schupke at> wrote:
> Linux systems can (and a lot do) have their system type (in the hardware 
> clock) set to GMT. Localtime is calculated from the timezone when you 
> call the gettimeofday function. This in IMHO is much better than windows 
> broken system of actualy moving the clock forwards and back for 
> daylight-savings.

This is standard for all Unices, not Linux specific.  If anything, Linux
is unusual in that it caters to the other case of keeping the hardware
clock in the local timezone, to ease interoperability with Windows (&
DOS) on dual-boot systems.

> This does mean that the above assumption could be wrong on linux, where 
> the default with no timezone could be GMT.

A system without a default timezone set is exceedingly rare -- all
installations force you to set one (which can be overriden on a
per-process basis by the environment).

Aaron Denney

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