Code:
alias num2date return $asctime($calc(86400*$1 - 2209248000),yyyy-dd-mm)

$num2date(39755) -> 2008-02-11
$num2date(39753) -> 2008-31-10
$num2date(39756) -> 2008-03-11

/.timerQ 1 0 echo /.timerQ 1 0 $timer(Q).com