World clock

I have now got almost everything to work on my dashboard except a regular world clock, it feels like you are developing a home assistant so much that you can soon send a human to space by pressing a button.
But to get a clock / clocks in add-on or HACS integrations seem impossible, have done exactly as it says on the lovelace-world-clock-card page without getting anything meaningful,

can not find the klock !? So I cant put it on dashboard!

Would be grateful if someone has the strength and interest to help a beginner,
like to “hold your hand” “step by step”

Is still Novis in programming but working on it

have my home assistant spinning on a Raspberry PI 3

You will need to use this sensor:

And for other time zones:

You can then put these sensors in an entities card, or for something a bit fancier, a markdown or picture element card.