Set computer time on arduino uno How to set computer time on Arduino Uno, and then control it (Arduino) with Serial monitor. For example show time on LCD.

I have no idea, how to make it using Arduino IDE. So, maybe I can write code in IDE, then load on Arduino. And with some script run Serial monitor also sending current time?

P.S. I have no additional boards like RTC or Ethernet.
A good place to start would be the "TimeSerial" sketch that comes with the Arduino Time library: https://playground.arduino.cc/Code/Time.