The timezone of the Fijis
Timezones are always computed by their difference to UTC, the "Universal Time Coordinated". On the Fijis exists only a single tonezone at UTC+12. E.g. New York has the Eastern Standard Time at UTC-5 and the time difference between NY and Fiji is 17 hours.
They have a nationwide clock change from standard time to daylight saving time, where the clocks are switched forward by 1 hour in summer.
The next clock change in Fiji will be on November 14th, 2021 at 2:00 to daylight saving time. Back to overview: Fiji