丁亥 ding hai

丁 above, 亥 below

The branch controls the stem: Water restrains Fire. The stem is working against its own footing, which shows up as effort that costs more than it should.

Where 丁亥 sits in the five elements

Earth and Metal do not appear anywhere in this pillar.

Water leads at 45.8%, then fire at 41.7%.

What is buried inside 亥

亥 hides 2 stems. The primary is 壬 (Water), what restrains the stem; behind it sit 甲 (Wood, what produces the stem).

丁 meeting 亥: the 胎 stage

The twelve stages (十二長生): yang stems run forward, yin stems backward.

丁 meets 亥 at the 胎 stage — conception.

亥 against 巳, with 寅

Opposite across the cycle (六沖), and paired with (六合):

Clashes with

巳 (Snake) — 己巳

Combines with

寅 (Tiger) — 丙寅

Nayin: 屋上土

Nayin (納音) groups the cycle in pairs, each with an image. This one shares its image with 丙戌: 屋上土, “earth on the roof.”

How 丁亥 is conventionally read

丁 is a flame held in the hand: smaller than 丙, more deliberate, warmer at close range. 亥 is the water that gathers at the end and starts the next turn.

A fire-element day master on a water footing — one of eight characters, which colours a chart and does not fix the person.

When the next 丁亥 days fall

The sixty-cycle repeats every sixty days, so this pillar returns roughly every two months. The next one is 9 November 2026 (Monday). Each is calculated at midday Beijing time; a birth in the hour before midnight can still belong to the previous 丁亥 day, because the day rolls at 23:00 true solar time.

Showing up to eight of the 6 occurrences in the next twelve months, from 2026-10-31.

丁 on six different footings

Six pillars carry this stem. It is the same day master every time, so everything that differs below is caused by the branch underneath it:

Here the footing is Water — what restrains the stem. The other five branches this stem sits on are 卯 (Wood), 丑 (Earth), 酉 (Metal), 未 (Earth), 巳 (Fire).