Hi Scorpiomatrix:
You pose an interesting query.
Rat Hour (子) reigns from 2300hrs - 0100hrs, which traditionally is the start of a New day according to ancient Bazi mechanism.
Right. Not only for
Bazi. In the same way that in the West and in all of Modernity and Postmodernity, the day starts at 00:00 hours, so in Ancient China and great part of Asia, the Day starts at what the Wests calls 11:00 pm or 23:00 hours. The Western way of reckoning time is a convention just as the Chinese way of reckoning time. So, you should decide which convention to follow. When I am doing
Bazi, I follow the ancient Chinese convention. When I go to work, I follow the current Western standard.
From the numerous Bazi discussions and Professional Consultants I questioned, there seems to be a common convergence that the distinction of 晚子时 (Late Rat) and 早子时 (Early Rat)... in order to acclimatise the practise in line with the current time order where a new day strikes at 0000hrs...
You are right again. The modern notions of Late Rat and Early Rat is a view of the first double.hour of the Chinese day from the Western standard of reckoning time.
In any case, for individuals born within the Late Rat Hour (晚子时) - 23:00 to 0000hrs - your day pillar should be plotted in accordance to following day's.
This is easy. It does not matter if your birthhour is Early Rat or Late Rat. The key word is Rat. So if you were born between 11:00 pm and 01:00 am, then you will chose the new day's date. Think of 11:00 pm as 12:00 midnight and you will see it clearly.
Happy bazi-ing (pronounced buzzing)
Manty