Re: [boost] [datetime] IANA Time Zone Database

Subject: Re: [boost] [datetime] IANA Time Zone Database
From: Rutger ter Borg (rutger_at_[hidden])
Date: 2012-11-09 06:56:15

On 2012-11-09 12:29, Jeff Garland wrote:
>
> In bdt the time_zone is abstract -- so you can build your own time
> zone names and such in any fashion you like.  What's needed to handle
> all the historic cases correctly is a derivative of time_zone which has
> the history and when asked to convert local to utc, adjusts
> appropriately for the
> relative time historically (effectively a list of offset rules).

Unfortunately, time_zone_base is not able to handle "any fashion you 
like", e.g., the Olsen database. It assumes exactly 2 switches per year, 
whereas there are cases that require 1 or 3 time zone changes in a 
single year.

Cheers,

Rutger