Hello, if I may introduce you.
I realized a worldwide equation clock using an openstreetmap with OpenLayer4.
Info: The solar time fluctuates and deviates from the time zone time. This can be compensated with the equation of time. The equation of time is a mathematical formula. With a click in the openstreetmap the true sun time can be displayed for every location in the world. In addition, a few gimmicks are installed (timeslider, terminator).
https://www.sutc.de/