1:25 Early Thursday Afternoon   Time and Relativity No one ever notices the changes of night. Are there any changes in night? hours and hours an go by and it will be the same. During daylight, however, the sun's position methodically and predictably moves, and so in a few hours, the shadows will be of different sizes, and the quality of light may be different. Chem exam is a week from monday. Hmmm.