What does 24 hundred time mean?

Answer 1

That sounds like a reading of the 24 hour clock:

For example 1800 = 18 hundred hours = 6pm in 12 hour clock.

In the 24 hour clock, the time is the number of hours and minutes since the start of the day. When the time is an exact hour, it is usually read n hundred hours.

Thus 24 hundred hours is 24 hours since the start of the day. As there are 24 hours in a day, it represents the midnight at the end of a day, as oppose to 00:00 which represents the midnight at the start of the day.

The midnight at the end of one day is the same as the midnight at the start of the next day.

For example 24:00 Tuesday is the same time as 00:00 Wednesday.

Normally, 00:00 would be used for midnight, but occasionally, 24:00 may be used to emphasise the end of a day; the last normal time (hour and minute) of a day would be 23:59.