When is half past two in the morning?

I believe everyone knows that in ancient times, the definition of time was not 24 hours, but 12 hours. So what time is 2: 30 in the morning? According to heavenly stems and earthly branches, it is from 23: 00 to 1, from 3: 00 to 5: 00 in Yin Shi, from 5: 00 to 7: 00 in Shi Mao, from 7: 00 to 9: 00 in Chen Shi and from 9: 00 to 1 in Shi Si. 1 1 to 13 is noon, 13 to 15 is the last time, 15 to 17 is the application time, 17 to/kloc-. Now it is generally expressed in 24 hours, mainly divided into morning, noon and evening.