$sql = "select l.id as id, l.timestamp as timestamp, TIME_FORMAT(l.start, $sql_time_format) as start,
TIME_FORMAT(sec_to_time(time_to_sec(l.start) + time_to_sec(l.duration)), $sql_time_format) as finish,
TIME_FORMAT(l.duration, '%k:%i') as duration,
$sql = "select l.id as id, l.timestamp as timestamp, TIME_FORMAT(l.start, $sql_time_format) as start,
TIME_FORMAT(sec_to_time(time_to_sec(l.start) + time_to_sec(l.duration)), $sql_time_format) as finish,
TIME_FORMAT(l.duration, '%k:%i') as duration,