大暑 Major Heat: summer solar term, July 22-24 大暑 · Dà Shǔ

Classical attributes

• Solar position: longitude 120°
• Date range: July 22-24
• Season: summer (late summer)
• Type: 氣 — Mid-term — within month
• Month branch: 未 (Goat)

Climatic register

The hottest period of the year — humidity and heat at sustained maximum. Late-summer dryness combines with deep heat; classical 'three fu days' (三伏) span this period, traditionally treated as the year's energetic apex.

Hidden stems of the 未 month branch

The 未 earthly branch holds these heavenly stems internally — read in BaZi as the “hidden essence” of the month pillar:

• 己 (Yin Earth, primary)
• 丁 (Yin Fire, residual)
• 乙 (Yin Wood, residual)

BaZi relevance

大暑 is the mid-term within the 未 month pillar. Charts cast around 大暑 carry the deepest fire-on-earth integration of the year. The 未 storehouse holds the maturing fire and the residual wood; for BaZi readers, 大暑 charts often need careful reading of how the fire is being held vs. consumed by the earth.

QMDJ (Qi Men Dun Jia) relevance

Late-summer yin dun; the speech / legal register of yin dun 7 opens, transitioning into the career-consolidation register of 1 and the scholar-completion register of 4. In the QMDJ system, 大暑 falls within the 陰遁 (yin dun, backward-rotating consolidation) half-year. The three thirds of this solar term map to 陰遁7局 (upper), 陰遁1局 (middle), and 陰遁4局 (lower) respectively. QMDJ consultations made during 大暑 carry the dun-period register stacked on top of the solar-term's seasonal energy.

For chart-aware QMDJ reading of a specific consultation made during 大暑, see the 18 Dun Periods reference for the relevant dun-period pages, or book a QMDJ forecasting consultation.

Observed register for 大暑 births

大暑 carries the register of peak-intensity sustained — the hottest, most-demanding period that requires both endurance and protection from over-extension. Born around 大暑 often carries a strong register of sustained focus under maximum pressure.

Why generic Major Heat interpretation fails

The solar term is one structural layer of a BaZi chart, not the whole chart. The actual reading for someone born around 大暑 depends on the day pillar (the Day Master), the year and hour pillars, the chart's elemental balance, and the upcoming luck pillars. Generic per-solar-term descriptions can name the foundational seasonal register, but they cannot tell you what your specific chart says. Master Sean Chan’s BaZi consultation reads the full chart against your specific question.

• Identify whether your birth or your question's timing falls within 大暑 (July 22-24). For BaZi practice, this mid-term sits within the 未 month pillar without changing it.
• Read the 大暑 register against your full chart. The solar term contributes a foundational layer; the rest of the chart determines actionable guidance.
• Plot your chart via the free BaZi Calculator to see how 大暑 interacts with your day, year, and hour pillars.
• Book chart-aware reading via BaZi consultation for high-stakes questions. Generic per-term reference is no substitute for the consultation.