"1020952472" is the number of seconds since the epoch.
What you want to do is feed this number to localtime(). Otherwise, it will use value returned by time().

$data = (head('http://web/web.html'))[2];
$days = ('Sun','Mon','Tue','Wed','Thu','Fri','Sat')[(localtime $data)[
+6]];
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--perlplexer

Update:
fixed a typo