1.- As a string of length 3. :P 2.- When we talk about the longest day, we are talking about daylight. That changes according to time of the year because of th

1.- As a string of length 3. :P 2.- When we talk about the longest day, we are talking about daylight. That changes according to time of the year because of the inclination of the earth. This is what I originally thought they were talking about. 3.- The usual way to define a day is exactly 24 hours. But this is a little bit different. It is not even exactly a turn of the earth of 360 degrees.