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Time zones: cheat sheet

Area, volume, circles and Pythagoras · The words and methods from the lessons, with an example of each.

time zones

Find the difference between the UTC offsets, add or take it away, and change the day if you cross midnight. For a flight, add the flight time in the departure zone, then change zones.

bigger offset: aheadsmaller offset: behind\text{bigger offset: ahead} \qquad \text{smaller offset: behind}
9:00 am Monday in Sydney, and the same moment in Perth, London and Tokyo
9:00 am Monday in Sydney, and the same moment in Perth, London and Tokyo