Australian Central Western Standard Time (ACWST)

Australian Central Western Standard Time (ACWST) operates at UTC+8:45 and is an unofficial time zone used in the Eucla region of southeastern Western Australia. Sometimes called "Central Western Time" or "Eucla Time," ACWST provides a local compromise between Australian Western Standard Time (AWST, UTC+8) and Australian Central Standard Time (ACST, UTC+9:30). Although not officially legislated, it is widely observed in the region to better align daylight hours with local needs.

Importance and Global Use of ACWST

ACWST plays a unique role in supporting local communities and transport services in a remote part of southeastern Western Australia. By adopting a 45-minute offset, residents and travelers benefit from daylight hours that are better aligned with daily life and road operations along the long, isolated stretches of the Eyre Highway. This helps businesses, road houses, and local infrastructure function more smoothly despite the region's distance from major urban centers.

Although its global impact is minimal due to its limited geographic area and small population, ACWST is recognized in international time zone databases and supported on many digital devices. This recognition helps standardize time references for travelers, transport schedules, and logistics across this remote yet strategically important transcontinental route.

Where and When ACWST is used worldwide