Interpretation and analysis: Time is a circle, each circle represents 12 hours, and the time of a day is 24 hours, so it means 3 o'clock sharp, including 3 am and 3 pm. 3: 00 am is usually represented by 03: 00, and 3: 00 pm is usually represented by 15: 00, which is a 24-hour clock. Of course, 12 hour means 03: 00 am and 03: 00 pm.

Conversion between ordinary timing method and 24-hour timing method.

1, the ordinary timing method is changed to 24-hour timing method.

The ordinary time-keeping method is changed to 24-hour time-keeping method, and time-limited words (morning, afternoon, etc. ) was deleted. The time before noon 12 is unchanged, and the time after noon 12 is added 12 hours.

2. Replace the 24-hour timing method with the ordinary timing method.

When the 24-hour clock method is replaced by the ordinary clock method, and the time limit (morning, afternoon, etc. ) all increase, the time before 12 is unchanged, and the time after 12 is reduced 12 hours.