here's what you likely ended up with :

use POSIX;

$dbh->do(
        'INSERT INTO announcements ( msg, start_timestamp, end_timesta
+mp ) VALUES (?,?,?)',
                undef,
                'Hello World',
                strftime("%Y-%m-%d %H:%M:%S",localtime(time)),
                strftime("%Y-%m-%d %H:%M:%S",localtime(time+2000))
        );
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