(one month of the year of Ren Yin goes into January 2023)
Besides assigning a pair of the 60 Sexagenary Pairs (Jia Zi) to the year, a pair is also assigned to every month of the solar part of the Chinese luni-solar calendar.
For example, in the year of Ren Yin 2022, all 12 solar months are assigned a Tian Gan Di Zi 天干地支 pair, beginning with Ren Yin 壬寅 (coincidentally the same as for the year this year) for the month beginning with Li Chun (Spring Begins). The following month starting with the solar term Jing Ze (Awakening of Insects) is assigned Gui Mao 癸卯, and so forth, as illustrated in the graphics above drawn up by myself.
The same 60 pairs of Tian Gan Di Zi are rotated also for the day and for the hour, resulting in 4 Pillars of Year, Month, Day and hour. This is why Ba Zi is also called 4 Pillars.
As you can tell by now, in a Ba Zi chart, there are actually 4 possibilities for the 12 Di Zi (used for the annual zodiac signs). There is a possibility of up to 4 different zodiac signs appearing in the year, month, day and hour pillars. The annual zodiac signs luck articles that you can read around the Chinese Lunar New Year festive period is based on the concept of Tai Sui (the year) and the related stars. A Ba Zi chart reading is different in that all 4 pillars are included in the analysis, and the technique is heavily based on the 5 Elements Theory, with the reference point shifted to the Day Master element instead of the Year.
If you like to book your Ba Zi birth chart reading now, it is priced at $150 per hour. It includes strengths and weakness analysis, versus the 10-year trigger influence pillar and the annual year pillar trigger influence.