I Doubt Our Time Is Shorter Than Before

When I was a child, I felt every day is a long time, it seemed that there was 30 hour a day, but now it is quite different. I feel there is only 18 hours a day. You may say it is only my feeling. But for me, I don't think it is just a feeling, I believe our time becomes shorter than before. I mean, there is only about 20 hours a day. This is quite possible.

Maybe someone should calculate whether it is shorter or not.