Date: Sun, 2 Apr 2006 07:45:50 +1000 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Cy Schubert <Cy.Schubert@spqr.komquats.com> Cc: freebsd-hackers@freebsd.org Subject: Re: 2007 Zoneinfo Message-ID: <20060401214550.GE684@turion.vk2pj.dyndns.org> In-Reply-To: <200604011618.k31GI7PF076963@cwsys.cwsent.com> References: <200604011618.k31GI7PF076963@cwsys.cwsent.com>
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On Sat, 2006-Apr-01 08:18:07 -0800, Cy Schubert wrote: >I think we should start thinking about the Daylight Saving Time changes due >in 2007. I'm not sure which locales will adopt the changes and which will >not adopt the changes. Having just been through a timezone rule change and followed the fallout both at work and on various mailing lists, I'd say it doesn't matter how much notice you give, people will wait until the last minute to actually do anything. (And then discover that to make the changes take effect, they need to restart processes but there's a ban on scheduled maintenance so they can't make the change until the change is irrelevant). I presume that (like Australia), each state is responsible for the legislation defining time in that state. In this case, you can't finalise much until the states individually make up their minds whether they are going to follow the changes or not. Depending on the degree of co-operative planning between states, this could even wind up being iterative - where states announce a decision and later change it due to pressure from surrounding states. On the assumption that not all states will follow the new rules, there are two areas that will need work: - At least some of the US timezones will have two active sets of rules (and therefore need two distinct names) - Will the knowledge of which locations use which rules be embedded in FreeBSD or not (ie, do I just select "I'm in Texas" and FreeBSD knows what timezone to select, or is there a choice of "I'm in CST using the old rules" vs "I'm in CST using the new rules"). Since FreeBSD basically imports the timezone files from NIH, this comes down to (probably) following whatever winds up in the imported TZ files. -- Peter Jeremy
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