Bougainville Standard Time (BST)

Bougainville Standard Time (BST) operates at UTC+11 year-round and is used exclusively in the Autonomous Region of Bougainville, part of Papua New Guinea. Introduced in 2014, BST was established to better align Bougainville's time zone with nearby Solomon Islands and improve regional coordination. It is sometimes informally called "Bougainville Time."

Importance and Global Use of BST

Bougainville Standard Time (BST) supports efficient administration, education, and daily activities in the Autonomous Region of Bougainville by providing a stable and convenient time standard. This helps manage services, transport, and business operations while accommodating the preferences of local communities for better daylight hours and stronger regional ties.

Internationally, BST facilitates closer synchronization with neighboring countries like the Solomon Islands and other Pacific partners. Its consistent UTC+11 offset supports trade, travel, and maritime activities in the region, improving coordination and cooperation with Bougainville's partners and enhancing its integration with the wider Pacific community.

Where and When BST is used worldwide

Other Time Zones in UTC +11

Other time zones share the same offset as Bougainville Standard Time (BST), but are known by different names. While their clocks align, they may represent different regions or countries based on local time zone definitions.

• Australian Eastern Daylight Savings – AEDT
• Kosrae Time – KOST
• Lord Howe Daylight Time – LHDT
• Magadan Time – MAGT
• New Caledonia Time – NCT
• Norfolk Time – NFT
• Pohnpei Standard Time – PONT
• Sakhalin Time – SAKT
• Solomon Islands Time – SBT
• Srednekolymsk Time – SRET
• Vanuatu Time – VUT