Originally Posted by
Dave Noble
How is 12am any less clear than 00:00 ?
In Japan under the older/formal system "12 am" is 12 noon and "12 pm" is midnight, although nowadays most people seem to use a twenty-four hour clock.
http://longtailworld.blogspot.co.uk/...-in-japan.html
I believe this style was formerly used by the US Government.
Originally Posted by
Dave Noble
I thought that it was only for departures where 00:00/12AM was avoided due to confusion some might have; for arrival times, not really of much concern
If you arranged to arrive on a specific day or wished to be met by another at the airport, I suppose it could cause some confusion for a small number of people.