Standard Time is 8 hours ahead of Greenwich Mean Time (GMT+8).
It is based on the mean solar time of 120°E, covering Western Australia and using time 8 hours ahead of GMT. Perth’s longitude is 115° 31’ East
Daylight Saving (Summer) Time is not observed in Western Australia. Following a 3-year trial of Daylight Saving Time, Western Australia voted to end the DST in 2009. See Daylight Savings Time .
The international dialling code for Western Australia is +618.
Government of Western Australia website : www.wa.gov.au