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 17:05:31

If you are rewriting a known amount of files, one time, to match your updated code, then you can use a script or simple program just smart enough to get that right.

It needs to know the time-change points that occurred during the half year in question.  Was it a spring-forward or fall-back?  The former is no problem.  The latter will give a duplicate hour.  If data was recorded during both hours, you can figure out where it went backwards by noting the time moving backwards between successive data points.  If no data was recorded during either hour, no problem.  If data was recorded during one of those hours only, or funny conditions like the first half of the first hour and the second half of the second hour, then you are sunk as you cannot determine which hour bearing the same number it was.

> I made a mistake, that's why. Now I have about a year worth of data and
> the
> recorder runs uninterrupted for the last half a year:) I have to
> rewrite the
> data to a new UTC format, but I don't know if it is possible to get rid
> of
> this gap using datetime library facilities. I am thinking of something
> like
> this:
> 

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