How to add more cities on Timezone?

How do I add more cities on booking timezone? Also, can I make it timezones (e.g. GMT time or EST time) instead of cities?

Thanks for bringing this up. Very important. So many cities are unavailable and it is super time consuming to research which cities timezone match with the cities already available.

We use this core PHP function to get a list of timezones, it’s not defined by HivePress PHP: timezone_identifiers_list - Manual I guess they list capital cities or state capitals. It may be possible to add new items to the drop-down, but via the code snippets only.