Hi wise monks!

I've found a very strange result of function localtime(). Let's see simple peace of code: 

for my $val ( qw(1 5 10 24) ) {

    print "Add $val hour ...\n";

    for my $date (qw(1096600000 1099170000) ) {
        print "\tBefore: $date - ".localtime($date)."\n";

        print "\tAfter: ".($date+$val*3600)." - ".localtime($date+$val
+*3600)."\n";

    }

    print "\n";

}

[download]
After run it I've got those results: 
Add 1 hour ...
        Before: 1096600000 - Fri Oct  1 06:06:40 2004
        After: 1096603600 - Fri Oct  1 07:06:40 2004
        Before: 1099170000 - Sun Oct 31 00:00:00 2004
        After: 1099173600 - Sun Oct 31 01:00:00 2004

Add 5 hour ...
        Before: 1096600000 - Fri Oct  1 06:06:40 2004
        After: 1096618000 - Fri Oct  1 11:06:40 2004
        Before: 1099170000 - Sun Oct 31 00:00:00 2004
        After: 1099188000 - Sun Oct 31 04:00:00 2004

Add 10 hour ...
        Before: 1096600000 - Fri Oct  1 06:06:40 2004
        After: 1096636000 - Fri Oct  1 16:06:40 2004
        Before: 1099170000 - Sun Oct 31 00:00:00 2004
        After: 1099206000 - Sun Oct 31 09:00:00 2004

Add 24 hour ...
        Before: 1096600000 - Fri Oct  1 06:06:40 2004
        After: 1096686400 - Sat Oct  2 06:06:40 2004
        Before: 1099170000 - Sun Oct 31 00:00:00 2004
        After: 1099256400 - Sun Oct 31 23:00:00 2004

[download]
It's amazing! Any ideads why result is "Sun Oct 31 23:00:00 2004"? It should be "Mon Nov 1 00:00:00 2004"!

Well, maybe there is a bug in the implementation of function localtime() but possibly it happened because today is my last work day before holiday :)

---
Michael Stepanov aka nite_man

It's only my opinion and it doesn't have pretensions of absoluteness!

In reply to Strange result of localtime() by nite_man

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