title: Valid IANA timezone list
body: <p>I'm working on an Nodejs system support multi timezone users. Currently, I'm using <a href="https://momentjs.com/timezone/docs/#/using-timezones/getting-zone-names/" rel="nofollow noreferrer">moment.tz.names()</a> to get list of available timezone. But I found out that some timezone in list is deprecated by this <a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones" rel="nofollow noreferrer">link</a>. I also found <a href="https://www.iana.org/time-zones" rel="nofollow noreferrer">this database</a> from IANA. So is there anyway to keep my timezone data up to date? I'm trying to find a way to work with IANA database.
  Thank you if there are any other approaches.</p>