0000 may refer to:
*the
year 10,000 problem
*a null
train reporting number or headcode
*a suffix to a time indicating
Coordinated Universal Time, rather than a local time zone
*the
null character
*
Midnight
Midnight is the transition time from one day to the next – the moment when the date changes, on the local official clock time for any particular jurisdiction. By clock time, midnight is the opposite of noon, differing from it by 12 hours. ...
in
24-hour clock
The modern 24-hour clock, popularly referred to in the United States as military time, is the convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours. This is indicated by the hours (and minutes) pas ...
{{number disambiguation