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.