Imagine the following:
You actually can stop the time by snapping you fingers, but it stops time for the entire universe, including yourself, with the exception of one single observer on some unimportant planet in the Andromeda galaxy. After 100 years from the POV of that observer, time resumes again.
Would you even be able to tell?
Because after moving very slowly and steadily for just about forever, the other galaxies will suddenly make a jump of like ten thousandth of a degree.