The other thing to add is at the moment, the Pico (despite having an RTC) isn't great at timekeeping since it uses the internal RC oscillator - you'd need to solder a crystal on the end of it to make it accurate enough for a proper clock.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The other thing to add is at the moment, the Pico (despite having an RTC) isn't great at timekeeping since it uses the internal RC oscillator - you'd need to solder a crystal on the end of it to make it accurate enough for a proper clock.