There are three time zones in Australia - Eastern Standard Time (EST) in New South Wales, Australian Capital Territory, Victoria, Tasmania and Queensland; Central Standard Time (CST) in South Australia and Northern Territory; and Western Standard Time (WST) in Western Australia. To add to the confusion, Australian States except Northern Territory, Western Australia and Queensland have daylight savings from October to March, but not all the states move clocks forward (or back) at the same time. Australia hasn't converted to the 24-hour clock, and instead is using am for before noon times, and pm for afternoon times. Because of the great time differences between Australia and other continents (and between Australian cities) it is wise to check local time when making international calls. More details at http://www.greenwichmeantime.com/time-zone/australia/daylight-savings-time/ and the Bureau of Meteorology http://www.bom.gov.au/climate/averages/tables/dst_times.shtml Melbourne and Sydney are usually UTC/GMT +10