Bruce Van Allen wrote:
Let me think out loud now. If we are always storing time _and_ TZ, then it certainly make more sense to me to use UTC to store the time. How's this for a good example (pseudo-code):On Thursday, January 30, 2003, at 05:52 PM, John Peacock wrote:Store in UTC (always).
John, is there a principle that could be stated, behind your 'NSHO'? This seems clear to me, but then I wonder if I'm trapped in some thought rigidity.
my $t1 = new DateTime::Simple ("2002-12-30T08:00:00", TZ => "EST");
my $t2 = new DateTime::Simple ("2002-12-30T08:00:00", TZ => "MST");
my $diff = $t2-$t1;
If we store the internal value as UTC, then differences are a simple matter of taking the difference between the internal UTC values. If we don't store internally as UTC, then we would need to adjust each $t to a common TZ prior to mathematic operations.
Besides, the whole idea behind UTC was to act as a common timezone that everyone could use (with the appropriate offset).
John
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John Peacock
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