What time is 00:00? 12-hour and 24-hour conversion
00:00 = 12:00 AM
Four-digit time (military format) · 0000
00:00 is 12:00 AM, midnight at the start of a day. To avoid confusion with noon, write “midnight, 00:00” and include the date.
This changes how the same clock time is written. It does not convert time zones or specify a date.
Count down to 00:00 (the selected time zone)Convert another time
For 24-hour input, use 17:30. For 12-hour input, use 5:30 and choose AM or PM. Supports 00:00–23:59; 24:00 and seconds are not accepted.
24-hour time
00:00
12-hour time
12:00 AM
Four-digit time (military format)
0000
This changes how the same clock time is written. It does not convert time zones or specify a date.
Open the full time zone converterHow to convert 00:00
00:00 is 12:00 AM, midnight at the start of a day. To avoid confusion with noon, write “midnight, 00:00” and include the date.
For hour 00, use hour 12 and AM in the 12-hour clock. Keep the minutes unchanged: 00:00 = 12:00 AM.
To convert 12:00 AM back to 24-hour time, replace hour 12 with 0, then add 12 for PM or leave it unchanged for AM. Keep the minutes to get 00:00.
Remove the colon from the 24-hour time, keeping two digits each for hours and minutes: 00:00 → 0000. This represents a clock time, not a duration of 0000 hours.
Frequently asked questions
- What do AM and PM mean?
- In this tool, AM covers 00:00–11:59 and PM covers 12:00–23:59. Remember: 12 AM is midnight and 12 PM is noon.
- Does this conversion change the date or time zone?
- This changes how the same clock time is written. It does not convert time zones or specify a date.