"Names normally have the form AREA/LOCATION, where AREA is a continent or ocean, and LOCATION is a specific location within the area" https://www.ietf.org/timezones/tzdb-2018i/theory.html

Cant Europe/Belgrade be duplicated and the second one renamed to Europe/Liberland?

On 2019-02-26 04:23:24 (+0900), filip wrote:

I was told that this is the community/staff of this mailing list that i should poke if i want to add an entry into the Time Zone Database.

[...]

Liberland is a pretty new country(2015) and the timezone is UTC+1(same as
serbian). Could it be added to your database? It shouldnt be so hard i think and in iana i trust!

The tzdb only records "time zones".  It does not record "countries".

Unless Liberland observes a different time from Serbia since 1970, the time is accurately represented by  Europe/Belgrade and there is no need for a separate timezone.

See also the "naming" section of https://www.ietf.org/timezones/tzdb-2018i/theory.html

Philip