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How To Determine The Day And Hour Pillars.

Next, let’s learn how to determine the Day and Hour Pillars.

Determining the Day Pillar, although there are methods available, is overly complex for practical use compared to simply consulting a perpetual calendar. Hence, it’s recommended to use a perpetual calendar to determine the Day Pillar. Many might wonder why, if the Day Pillar can be found in a perpetual calendar, we need to learn about determining the Year and Month Pillars.

Indeed, understanding how to determine the Year and Month Pillars is necessary. As explained in video tutorials, one simple reason is that perpetual calendars are based on the local time of their authors. Thus, some people might find discrepancies in their Bazi across different calendars. This underscores the importance of being able to discern for ourselves.

While the Day Pillar can be determined by consulting a perpetual calendar, special attention should be paid to the division of the hour, especially the Zi hour. The Zi hour is divided into early Zi hour and late Zi hour, spanning from 11:00 PM to 1:00 AM the following day. The period from 11:00 PM to midnight is considered the late Zi hour, and from midnight to 1:00 AM is considered the early Zi hour.

For example, if you were born on June 6 at 0:15 AM, the question arises: should this be considered the Zi hour of June 5 or June 6? The answer is the early Zi hour of June 6; if the birth occurred before midnight, it would be considered the late Zi hour of June 5.

Having determined the Zi hour, the rest of the hours can be deduced accordingly, with each time period covering two hours from Zi to Hai, completing the twelve-hour cycle. This means the translation from hour to time period is clear, thus covering the Earthly Branches of the Hour Pillar, i.e., 1:00 AM to 3:00 AM is Chou hour; continuing in this pattern through all twelve hours.

But how is the Heavenly Stem of the Hour Pillar determined? A mnemonic aids in this determination: Jia and Ji return to Jia, Yi and Geng start with Bing, Bing and Xin begin with Wu, Ding and Ren find home in Geng, and for Wu and Gui, seek where Ren is the true path. This means that for Jia or Ji days, the Zi hour is Jia Zi, and so on, with each Stem following in sequence. For Yi and Geng days, the cycle starts with Bing at Zi hour; for Bing and Xin days, it starts with Wu, and so forth, sequentially.

The impact of daylight saving time must also be considered. In eras of resource scarcity and efforts to maximize daylight, many countries and regions adopted daylight saving time, advancing the clock by an hour during summer. An hour equals half a time period, so during daylight saving time, the clock must be set back an hour to accurately determine the Hour Pillar.

For those born outside of China, where local time doesn’t align with Beijing time, the local time of birth should be used. Even within China, unless born at a longitude of 120 degrees, Beijing time should not be applied directly. Time reflects the relative position of the Earth to the Sun, and given the variation in geographical location, true solar time differs accordingly. The concept of true solar time will be detailed in the following chapter.

Next Recommendation

  1. How to Construct the Four Pillars
  2. Finger Counting for Determining the Year Pillar
  3. How to Determine the Year Pillar
  4. How to Determine the Month Pillar
  5. Finger Counting for Determining the Month Pillar
  6. How to Calculate Your Fortune Using Bazi

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