Sure.
Anything that can be copyied with error is subject to evolution.
This Means your actual everyday day is also subject to evolution, as you can try copy the next day, it outside interferrence will keep on mutating your copies.
Pretty few people can copy their days at autism level, but some autismics are capeable of controlling their bodyfunctions well enough to go to the toilet by the timetable. Some Watch reruns of the same tv each day, and soo on.
In effect they try to copy their days as pure as possible, and rage whenever anything gets out of order...
The World seems to Work smoother when everyone does the same, but some people demand deviation to keep themselves happy which is the actual reason why the World has different days each day :D