Day Master Compatibility Chart: All 100 Pairings at a Glance
Two Day Masters are in one of only a few relationships, and the full chart has 100 cells (55 distinct pairs). Just 5 pairs combine (Jia–Ji, Yi–Geng, Bing–Xin, Ding–Ren, Wu–Gui) and 4 clash; the other cells are same-stem, supportive or controlling matches. Below is the whole grid, what each cell means, and a checker for any two birthdays. Day Master is one layer of compatibility, not a verdict on a couple.
The full Day Master compatibility chart
Your Day Master is the Heavenly Stem of your day pillar, the "self" of the chart (how to find yours). Read the row as your Day Master and the column as theirs. Each cell shows what they are to you as a ten god. A bold 合 marks a Stem Combination and a red 沖 a Stem Clash. Swipe sideways on a phone.
Key: F = Friend, RW = Rob Wealth, EG = Eating God, HO = Hurting Officer, IW = Indirect Wealth, DW = Direct Wealth, 7K = Seven Killings, DO = Direct Officer, IR = Indirect Resource, DR = Direct Resource.
| Jia 甲 Wood | Yi 乙 Wood | Bing 丙 Fire | Ding 丁 Fire | Wu 戊 Earth | Ji 己 Earth | Geng 庚 Metal | Xin 辛 Metal | Ren 壬 Water | Gui 癸 Water | |
|---|---|---|---|---|---|---|---|---|---|---|
| Jia 甲 Wood | F | RW | EG | HO | IW | DW 合 | 7K 沖 | DO | IR | DR |
| Yi 乙 Wood | RW | F | HO | EG | DW | IW | DO 合 | 7K 沖 | DR | IR |
| Bing 丙 Fire | IR | DR | F | RW | EG | HO | IW | DW 合 | 7K 沖 | DO |
| Ding 丁 Fire | DR | IR | RW | F | HO | EG | DW | IW | DO 合 | 7K 沖 |
| Wu 戊 Earth | 7K | DO | IR | DR | F | RW | EG | HO | IW | DW 合 |
| Ji 己 Earth | DO 合 | 7K | DR | IR | RW | F | HO | EG | DW | IW |
| Geng 庚 Metal | IW 沖 | DW 合 | 7K | DO | IR | DR | F | RW | EG | HO |
| Xin 辛 Metal | DW | IW 沖 | DO 合 | 7K | DR | IR | RW | F | HO | EG |
| Ren 壬 Water | EG | HO | IW 沖 | DW 合 | 7K | DO | IR | DR | F | RW |
| Gui 癸 Water | HO | EG | DW | IW 沖 | DO 合 | 7K | DR | IR | RW | F |
The grid is not symmetric, because the same pair looks different from each side. When a stem is your Wealth, you are its Officer; if it is your Output, you are its Resource. Friends and Rob Wealth look the same from both sides. That is why the grid has 100 cells but only 55 distinct pairs.
How many pairings are friends, supporters, controllers, combinations or clashes?
We sorted all 100 cells with the engine's stem rules. Each of the ten gods fills exactly 10 cells, and the groups look like this:
| Relationship | Cells | Share | Includes |
|---|---|---|---|
| Same stem | 10 | 10% | Friend: you and your mirror, e.g. Jia–Jia |
| Same element, other polarity | 10 | 10% | Rob Wealth: a sibling-like rival, e.g. Jia–Yi |
| One produces the other | 40 | 40% | Output / Resource, e.g. Jia (Wood) feeds Bing (Fire) |
| One controls the other | 40 | 40% | Wealth / Officer, e.g. Jia (Wood) holds Wu (Earth) |
| of which Stem Combination 合 | 10 | 10% | 5 pairs: Jia–Ji, Yi–Geng, Bing–Xin, Ding–Ren, Wu–Gui |
| of which Stem Clash 沖 | 8 | 8% | 4 pairs: Jia–Geng, Yi–Xin, Bing–Ren, Ding–Gui |
Two things stand out. First, every combination and every clash is a "control" pairing: 18 of the 40 controlling cells are a combination or a clash, while none of the 40 supportive cells is. So the strongest pull and the strongest friction both come from a Day Master that restrains the other. Second, a randomly chosen couple has only a 10% chance of a Stem Combination and 8% of a clash, because Day Masters are spread evenly (each stem takes the day pillar of 6 of every 60 days).
What does each relationship mean for a couple?
These are the traditional readings, offered as one lens and not a prediction.
| When they are your… | Traditional reading |
|---|---|
| Friend (same stem) | Easy recognition and shared habits, but also the same blind spots. Neither one steps back first. |
| Rob Wealth (same element) | Close, competitive, like siblings. Sharing resources works if the roles are clear. |
| Eating God / Hurting Officer (you produce them) | You give, express and take care of them. Warm, but it can wear you out if one-sided. |
| Direct / Indirect Resource (they produce you) | They support, teach or shelter you. Comfortable, as long as it doesn't become dependence. |
| Direct / Indirect Wealth (you control them) | You take the lead and manage things. Read as the partner star for men in tradition. |
| Direct Officer / Seven Killings (they control you) | They set standards and push you. Read as the partner star for women in tradition. Seven Killings is the sharper, more intense version. |
| Stem Combination 合 | A strong mutual pull and a sense of fitting together. The pair even "transforms" toward a new element (listed below). |
| Stem Clash 沖 | Head-on contrast in methods and pace. Can be stimulating, can be tiring. |
The Stem Combinations, each with its transformed element, are Jia–Ji (Earth), Yi–Geng (Metal), Bing–Xin (Water), Ding–Ren (Wood), Wu–Gui (Fire). A Day Master has exactly one combination partner. Wu and Ji have no clash partner (they sit in the center and are Earth).
What is the relationship between our two Day Masters?
Everything is calculated in your browser and nothing is sent anywhere. The Day Master changes at 11 PM in some traditions, so if someone was born between 11 PM and midnight, check the next day too. Only 1900–2100 is supported.
Is Day Master compatibility enough to judge a match?
No. The Day Master is one of eight characters. Compatibility also looks at the day branch (the "spouse palace"), the elements each chart needs (the useful element), and how each person's luck pillars overlap. Two Day Masters that clash can still balance each other if one supplies the element the other lacks, and a perfect Stem Combination can still struggle if the day branches clash. See how compatibility is read and the zodiac compatibility chart for the branch side.
How the chart was calculated
For each of the 100 stem pairs the engine's tenGod function gives the ten-god relationship and stemRelation (in analysis.js) checks for a Stem Combination (stems five apart: Jia–Ji, Yi–Geng, Bing–Xin, Ding–Ren, Wu–Gui) or a Stem Clash (stems six apart, excluding Wu and Ji: Jia–Geng, Yi–Xin, Bing–Ren, Ding–Gui). The groups above are counts of the cells in the grid. Combination elements are the ones the engine returns for each pair. Traditional meanings are summaries and differ between schools.
Frequently asked questions
How many Day Master combinations are there? 10 cells (5 pairs): Jia–Ji, Yi–Geng, Bing–Xin, Ding–Ren, Wu–Gui. Each Day Master has exactly one combination partner.
Which Day Masters clash? 4 pairs: Jia–Geng, Yi–Xin, Bing–Ren, Ding–Gui. Wu and Ji have no clash partner.
Is a Stem Combination the best match? It is the strongest pull, not automatically the best match. It is only one layer, so read it together with the day branch and each person's useful element.
Do two people with the same Day Master get along? Often easily, since they share a style, but they may also share the same weak spots. In ten-god terms each is the other's Friend.
How do I find my Day Master? It is the Heavenly Stem of your day pillar. Enter your birthday in the checker above, or see the ten heavenly stems for a full guide.
Does the Day Master depend on birth time? Almost never. It depends on the date, except for births within the hour around midnight in some traditions.
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See our full compatibility