Some
theorists believe that our preception of time is based on the speed of light.
Also, there are some theorists that are now saying that the speed of light is NOT a constant. So that our view of time is based upon the speed at which our sun emits it's rays (which is constantly in flux).
Therefore; if you feel that a particular day seemed to take longer to go by and everyone you ask agrees with you, maybe time moved a little more slowly that day.
Just another bit of science to help disprove reality.