24 hours a day is the best.

Someone said to me they wanted to lengthen a day which has only 24 hours to be 30 or 35 hours a day and I agreed with that. Their reason was that they wanted to successfully work or do anything in time. However, in the present, I think 24 hours a day is enough because I'm not sure whether we can work or do in time though we have more times; moreover we may get much more work than we do now. More hours are not guaranteed that we're successful in working or solving problem easily. As long as human beings' needs are infinite, 48 hours a day is not enough for them. Therefore, we should completely manage everything we have within these valuable 24 hours.