AEST to PST Converter

Sydney sits at UTC+10 in its winter and UTC+11 in its summer. Los Angeles sits at UTC−8 in its winter and UTC−7 in its summer. Because the two summers fall in opposite months, the distance between the clocks swings from 17 hours in the middle of the year to 19 hours around the new year.

New South Wales changes on the first Sundays of October and April (NSW Government); California changes on the second Sunday of March and the first Sunday of November (US Department of Transportation). In the gaps between those dates both sides are either on daylight time or on standard time together, and the difference is 18 hours.

A quick shortcut: instead of subtracting 17 to 19 hours, add 5 to 7 hours and step back one day. At a 19-hour gap, 8:00 AM Tuesday in Sydney becomes 8:00 AM + 5 hours = 1:00 PM, on Monday in Los Angeles. At 17 hours, add 7 instead and you get 3:00 PM Monday.

The overlap is short, so it pays to rotate it. One week the Sydney team takes a 7:00 AM call, the next week the California side stays until 5:00 PM. Brisbane needs separate care from October to April, when it stays on AEST and sits one hour behind Sydney, which makes it 18 rather than 19 hours ahead of Los Angeles in the middle of the southern summer.

To see both sides live, open the Sydney and Seattle clocks. For the reverse direction, use the PST to AEST converter.