Re: Production systems beware: U.S. Daylight Savings Time comes at a new time this year

On Thu, 2007-02-01 at 15:15, Richard Troy wrote:
> Hello All,
>
> it was recently brought to my attention that last year the U.S. altered
> the dates when Daylight Savings Time starts and ends. Many if not most
> computers presume the old change dates and therefore, if left to change
> automatically, will change at the wrong times. This will be vital for
> people in the database community who manage applications that need
> accurate timestamps.
>
> You can read up on this issue here, among other places:
>
> http://www.washingtonpost.com/wp-dyn/content/article/2007/01/31/AR2007013102318.html?referrer=emailarticle
>
> I've never investigated how NTP servers handle DST changes - that is,
> whether they switch with the fabrication that we have more daylight hours
> or leave it to clients. Hmmm... Anybody know? It'd be nice to know that
> we can trust our NTP servers to tell our systems what time it is and
> therefore ignore this issue for those systems that are NTP clients.

As far as I know, NTP servers run on UTC, so time zone changes are
outside the realm of things they worry about.