Subject: Re: Registry Date format in Windows
From: [email-masked] ($Bill Luebkert)

16 Aug 1998 19:40:46 -0700
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To: "[email-masked]" <[email-masked]>

Guglielmo Pasa wrote:
> 
> How is the date stored in the registry of Windows ?
> 
> For  example I installed a programm the 04.08.98  at 14h30 (4th August 98) and in
> the registry the date is written as
> 
> 902233852
> 
> How is it converted ? What is the algorihm ?

Looks like seconds since the Epoch (Jan 1, 1970).  Except for the 
100 and 400 year exceptions and leap year tallying, it's just the 
simple conversion of years, months, days, hours and minutes to 
seconds since the Epoch time.

Here's the BSD man page for the asctime, ctime, difftime, gmtime, 
localtime, mktime functions:

http://www.bsd.com/bsdi-man?proto=1.1&query=asctime&msection=3&apropos=0

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