Calculation method of time

Ugly time 0 1 to 03: 00

03: 00 to 05: 00 Yin Shi time.

05: 00 to 07: 00 in Shi Mao

07: 00 to 09: 00 a.m.

09: 00 to 1 1: 00.

At noon, from 1 1 to 13.

13 to 15.

From 15 hours to 17 hours.

From 17 hours to 19 hours.

From 19 hours to 2 1 hour.

Shihai 2 1 point to 23: 00.

When there is no such thing as c and a, it is a year, for example.