FJT is used in this dataset for Fiji Time. Right now it maps to 1 meaning, 1 IANA zone, and 1 country.
The busiest cities using FJT in the current catalog are Nasinu, Suva, Lautoka, Nadi, and Labasa. The lead live reference on this page is Nasinu (Pacific/Fiji), currently at +12:00 (GMT+12). Those cities are what give FJT its actual feel rather than the abstract offset.
FJT has a local identity beyond its offset: Fiji civil time through Pacific/Fiji, Suva, Nadi, resort corridors, and inter-island transport. Calendar signals such as Fiji Day, Diwali, Eid and Christmas holiday periods, and school-holiday travel peaks and operational signals such as Nadi and Suva aviation, resort transfers, South Pacific conferences, and ferry and cruise logistics are why this abbreviation should not be flattened into a same-offset neighbor.
FJT is stable on Pacific/Fiji year-round, with no seasonal clock changes in the next year. That makes it a low-friction choice for recurring meetings and broadcast schedules — but software still prefers the IANA zone because governments can change civil-time rules independently of the short code.