a friend of a friend told me that he had worked in a company in munich ( in the financial sector ) where the management had tweeked the local timeserves. every device synced to a time-server ( mobile phones, lap tops, desktops etcetera ) would receive tampered time information when being logged into the companies wifi.

this interference with a linear passing of time, resulted in shorter breaks and longer meeting hours. depending on what the management saw fit.