Time in Papua New Guinea
Papua New Guinea is divided into two time zones, namely:

 Papua New Guinea Standard Time (UTC+10:00), which covers most of Papua New Guinea except the Autonomous Region of Bougainville. Bougainville Standard Time (UTC+11:00), which covers the Autonomous Region of Bougainville. IANA time zone database 
The IANA time zone database gives Papua New Guinea two time zones, Pacific/Bougainville and Pacific/Port Moresby. References

Time in Oceania
Science and technology in Papua New Guinea
Standards