Re: [Boost-users] handling of daylight saving time...

Subject: Re: [Boost-users] handling of daylight saving time...
From: John Dlugosz (JDlugosz_at_[hidden])
Date: 2010-04-30 17:00:40

I use code based on the Olson database to figure out concomitant civil times.  I don't think Boost has a module that includes this full database (that is, knowledge of how the time is changed when the rule was different in different years).

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of Archie14
> Sent: Friday, April 30, 2010 10:22 AM
> To: boost-users_at_[hidden]
> Subject: [Boost-users] handling of daylight saving time...
> 
> My software records time events on the computer and it does it using
> whatever
> timezone and daylight saving time settings are on this computer. I
> realized
> too late that, while storing timestamps, I am not accounting for this
> daylight
> adjustment process. So, if hypothetically speaking, the daylight
> adjustment
> happens today at 9:00 am and I am writing my timestamps every second I
> will
> have something like that:
> …
> 8.58
> 8.59
> 9.00
> 10.01 (without timesaving should be 9.01)
> 10.02 (without timesaving should be 9.02)
> …
>  When I am reading my timestamps back I am constructing timezone and
> using it
> for timestamps manipulation
>  std::string gmt = (boost::format("TMZ%1%
> TMS1:00:00,M3.2.0/02:00:00,M11.1.0/02:00:00") % gmtoffset).str();
> , but this one-hour gap persists, as I now think it should.
> 
> The question is: is it possible to do manipulation with datetime
> library to
> remove this gap without hard-coding  one hour removal after specific
> date/time
> of daylight saving time?
> 
> 
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