qantas uses a 24 hour clock in their timetables, very confusing for US passengers as their VCRs use a 12 hour clock for programming with am and pm, so a 24 hour clock confuses them, perhaps am and pm should be added to the times
It does not seem to be confusing for people from other countries.
If one uses the 24-hour clock one will be spared the embarrassment - and the possible extra expense - of showing up at an airport either twelve hours too early, or a similar period too late.
As my grandson told me once, "Get over it!"