When I rule with an iron fist

Once I succeed in becoming supreme dictator, the following rules will be enforced on pain of imprisonment: All measurements will be in SI units or derived metric quantities. All dates and times will be written in ISO8601 formats, and measured in UTC. A special exemption will be made for astronomers, who will be allowed to continue to use Astronomical Time. All times will be in UTC, and hence “daylight savings” will be illegal.