Hey Moonchin:
Long time no see (or talk or better yet, mail). At any rate, happy Western New Year to you and yours.
晚子時 , 早子時 is NOT a western innovation, but IS a 'western concept of time' INFLUENCED concept within Bazi circles in the FarEast.
I think we are basically saying this with different nuances.
In the sixties, this concept was already accepted and practiced by many Hong Kong and Taiwan masters. Their argument is based on the western concept of time -- that the next day starts at 00:00 hrs. So did ZiPing started to turn in his grave in the sixties? or earlier?
Yes, I am familiar with this so called argument. However, at least in Taiwan, it was not an issue among the traditional practitioners of Bazi. It was, however, a hot topic, among the "learn it yourself with books" practitioners of Bazi.
For Venerable Master Ziping, I think he saw it coming

and hence he is not turning in his grave.
There is a little bit of logic in this concept because if we look in-between the two extremes of Black and White, there are different shades of grey. From Black graduating to White, it starts with 99% grey gradually brightening to 50% grey, and then starting at 50% (half white half black) graduating to 75% white then 99% ......
I think that more than using the argument of flow and reflow or ebbing and waning, this idea makes sense to those who are simply used to reckoning time in the Western fashion.
For me to eat food with fork, especially metal made fork is, shall I say a bit of a yucky experience. I like to eat with wooden chopsticks or with chopsticks fashioned freshly from fragrant green bamboo canes. I think it is a supreme culinary experience way beyond that of "Iron Chef". However, I have good western friends that are grossed out with the wet feeling of fresh bamboo chopsticks, and I see in them the same kind of yuckiness I feel when I need to eat with a metal fork or spoon.
So it is not really a matter of black and white, but more a matter of what one is used to.
For many Westerners the notion that the day starts at 11:00 pm is weird. At 11:00 pm they do not FEEL the new Qi. The want to wait until 12:00 midnight which, for them, is a natural changing over time.
So when I do Western Astrology I use that standard. But when I do Bazi, I do not. Likewise, when I eat, I prefer to eat with chopsticks, especially Chinese food. It just feel weird to eat with fork and knife and spoon over flat big plates. When I am eating Western food, well, when I do not have my trusty portable chopsticks with me, I force myself to eat with.. ahem... those metal thingies.
For some reason, this post has made me hungry...
What shall we cook Moonchin? How about those wonderful Malasyan wraps... I forgot what they are called... don't need to use chopsticks nor forks. Or some Thai Banseo..?
Manty