1. Good Pairing Rules

A good date forms a relationship with your birth year hexagram. We evaluate the HE (Upper) and EB (Lower) numbers.

Both HE & EB Rules:

• ហៈ 10 (Sum 10): 1↔9, 2↔8, 3↔7, 4↔6
• គូរធាតុ (Same): 1↔1, 2↔2... 9↔9
• ហៈសែសេង (Diff 5): 1↔6, 2↔7, 3↔8, 4↔9
• ហៈ 5 (Sum 5): 1↔4, 2↔3
• ហៈ 15 (Sum 15): 6↔9, 7↔8

EB ONLY (Lower) Rule:

• ហៈរាសីខាងក្រោម: 1↔3, 2↔4, 6↔8, 7↔9

2. Four Pillars Auspicious Patterns

The selected date is even more auspicious if its Four Pillars (Year, Month, Day, Hour) form specific Xuan Kong Da Gua patterns among themselves:

• Pure Gua (一卦純清): All four upper or lower numbers are exactly the same (e.g., 2, 2, 2, 2).
• Sum of 10 Pattern (合十格局): The four numbers form two pairs that sum to 10 (e.g., 1, 9, 2, 8).
• He Tu Pattern (河圖格局): The four numbers form two pairs with a difference of 5 (e.g., 1, 6, 2, 7).

If a pattern is detected on the selected date, it will automatically appear as a glowing badge below the Four Pillars panel!