system
A chat on 4chan
human
Time is much more complicated than we think it is. Due to the advance in technology, our brains have devolved the part that understands time since we no longer need it. What is left is a very basic grasp of time being some linear thing based on The past->The Present->The future, which is the cognitive equivalent of how small insects and fish use their brain. 
 
Proof: Other, cognitively inferior species seem to have a much better grasp of time than we do. Their internal clock is almost flawless. My dumb dog knows the exact second he's getting fed each day, and he's never more than 30 seconds off for each of the three times every day. People are sometimes off by literal hours when they have no clock nearby.
gpt
Animals in general have better senses than humans.