Why is 24.00 hours often quoted as 12.00 a.m. when surely it should be 12.00 p.m. ?

12PM IS NOON.

as it is mostly the military and official people that use the 24 hour clock there are a few points to bring up. 1/ 1200 is mid day and 0000 is midnight 2/ no am or pm is used, 3/ say you are talking about midnight on 23rd you could use 2359 to ensure the 23rd is recognised and 0001 to show the morning of 24th hope this helps you out.

Because 12 p.m. is noon. A new day doesn't start at noon, it starts at midnight. Therefore 12:00 a.m. (midnight) is the start of a new 24 hours.

So you want to do 12:00pm as midnite and one minute after is 12:01am??? Or you want to keep going so one minute after midnite is 12:01pm and six hours later in the morning is 6:00pm and one minute before noon is 11:59pm??? How about that, now you happy?? Dude, afternoon starts AT noon 12:00pm. It is the starting point of the afternoon.

12 am midnight and then 12 am midday, that's confusing. use the term 2359hrs to finish the day 1 second before midnight and 0001hrs to start the next day just after midnight, theoretically midnight would be 0000hrs. as used in the forces and elswhere

OH forget the 24 hour clock . Yes midnight is 12 pm and one minute later is 12 01 am

12 pm means 12 past mid day so no it shouldnt be am. 12 am means 12 after midnight.

Midnight is 12:00am, because the morning hours (1:00am, 2:00am etc.) start then.

Surely you don't get it. Midnight is 12:00AM and noon is 12:00PM. Deal with it.

People used to start the day at sundown.

I'll let you in on a secret: there are actually 23 hours in a day, not 24. ;-)