Kosrae Time (KOST)
UTC offset: +11:00
IANA identifier: Pacific/Kosrae
Abbreviation: KOST
Population: approximately 6,600
DST observed: No
Kosrae runs eleven hours ahead of UTC, fixed all year. No daylight saving. The island is one of four states in the Federated States of Micronesia (FSM), and each state maintains its own time zone. Kosrae and Pohnpei share UTC+11:00, while Chuuk and Yap use UTC+10:00. The one-hour difference within a single country creates minor coordination issues for the national government in Palikir (on Pohnpei).
The Island
Kosrae is a single high volcanic island of about 110 square kilometers, rising to 629 meters at Mount Finkol. It looks, from certain angles, like a reclining woman, earning it the nickname "Island of the Sleeping Lady." The coastline is fringed with mangroves and coral reef. The interior is dense tropical rainforest with few roads.
Unlike atoll nations, Kosrae has freshwater rivers, arable land, and elevation. It won't disappear with sea level rise. The lush green landscape stands out compared to the low coral atolls elsewhere in Micronesia.
Tofol
The administrative center. In practice, Tofol is a handful of government buildings, a high school, and some housing along the main road. Kosrae doesn't have a "city" in any conventional sense. Population is distributed across four municipalities (Lelu, Tafunsak, Malem, and Utwa) around the island's coast.
Lelu is historically the most significant settlement, home to the Lelu Ruins, a complex of ancient basalt-walled compounds dating to the 14th-15th centuries. These are sometimes compared to Nan Madol on Pohnpei (a much larger complex), though Lelu is less well-known internationally.
Economy
Government employment (funded by US Compact of Free Association payments) dominates. The FSM's relationship with the United States provides significant annual funding in exchange for military access rights. Beyond government: subsistence farming (taro, breadfruit, banana), fishing, and very limited tourism.
Tourism potential is high but undeveloped. Kosrae's reefs are in excellent condition (among the best in Micronesia), with superb diving and snorkeling. A few small hotels and dive operations exist, but access requires connections through Guam or Honolulu, limiting visitor numbers.
Compact of Free Association
The FSM (including Kosrae) gained independence from the US in 1986 under a Compact of Free Association. The arrangement provides: US military defense of the FSM, substantial annual financial assistance, and FSM citizens' right to live and work in the United States without a visa. In return, the US maintains military access denial rights (preventing other powers from using FSM territory). The Compact was renewed through 2043.
Many Kosraeans have migrated to Hawaii, Guam, and the US mainland for employment and education. Remittances flow back to the island.
Culture
Kosraean society is strongly Christian (Congregational Church dominant, introduced by American missionaries in the 1850s). Church life structures weekly routines. Sunday is strictly observed. Traditional Kosraean customs coexist with Christianity: respect for chiefs, communal food sharing at gatherings, and extended family obligations.
The Kosraean language is distinct from other FSM state languages (Pohnpeian, Chuukese, Yapese). English is the language of education and official business.
Scheduling
At UTC+11:00:
- Pohnpei (FSM capital): same time
- Chuuk/Yap: 1 hour behind (+10:00)
- Guam: 1 hour behind (+10:00)
- Australia (AEST): 1 hour behind (+10:00)
- Hawaii: 21 hours behind (-10:00, previous day)
- US East Coast (EST): 16 hours behind
Business coordination with the US requires extreme scheduling accommodation. When Washington DC opens at 9:00 a.m., it's 2:00 a.m. the next day on Kosrae.
Neighboring Zones
| Zone | Offset | Difference from KOST |
|---|---|---|
| Pohnpei | UTC+11:00 | Same |
| Marshall Islands | UTC+12:00 | 1 hour ahead |
| Chuuk/Yap | UTC+10:00 | 1 hour behind |
| Guam | UTC+10:00 | 1 hour behind |
| Solomon Islands | UTC+11:00 | Same |
| Norfolk Island | UTC+11:00 | Same |
Technical Identifiers
- Pacific/Kosrae (IANA canonical)
- KOST (Kosrae Time)
- Windows: "Central Pacific Standard Time"
- Military/aviation: K+1 (UTC+11:00)
Quick Reference
| Attribute | Value |
|---|---|
| UTC offset | +11:00 |
| DST observed | No |
| IANA zone | Pacific/Kosrae |
| Population | ~6,600 |
| Administrative center | Tofol |
| Country | Federated States of Micronesia |
| Nickname | Island of the Sleeping Lady |
| Historic site | Lelu Ruins (14th-15th century) |
| Same offset as | Pohnpei, Solomon Islands |
| US Compact | Free Association (through 2043) |