Question

What is the difference between 24:00 clock and 00:00 clock. IMO 24:00 clock is the day before and 00:00 clock is the beginning of the new day. But I’m not really convinced and I’m new to date programming

Update: Here is what wikipedia article say about military time and style guide about how to deal with 24:00 and 00:00 confusion: http://en.m.wikipedia.org/wiki/24-hour_clock#section_1.

Answer 1

After 23:59 comes 0:00, not 24:00
Please see the code below, in php, as you put the ‘php’ tag:

echo date('G:i:s', mktime(0,0,0)) . "\n" ;
echo date('G:i:s', mktime(0,0,0)-1) . "\n" ;

It will display:

0:00:00
23:59:59