Using API to extract time in a specific time zone

Question

Good Morning,

I am very new to JS and I am writing pseudo code to wrap my head around the logic behind this process. I am trying to generate a tool which checks all the available time zones and prints when it is 8am with a notification that says, [Wake up it is 8am in "That time zone or city"].

Is this something that can be done calling an API such as https://www.timeapi.io/swagger/index.html or do I have to have a list with all the time zones and have a counter so that it posts when the counter has the UTC++?

Thanks for the pointers!