Open a Chinese calendar app and you often see two public blocks on one screen: Yi and Ji list which activities suit or avoid that day, while Peng Zu taboos add one stem line and one branch line in folk phrasing. Beginners merge both kinds of “Ji” with personal unfavorable elements in a chart. This page is the public calendar layer only.

For how to read Yi/Ji, see Yi / Ji explained. For lunar almanac vs personal BaZi calendar, see lunar almanac vs BaZi calendar. I pull tables from lushn.one.

Side-by-side

Yi / Ji: activity timing

Yi (“suitable”) and Ji (“avoid”) key off the day pillar and name traditional activities. Same date, same list — regardless of zodiac or Day Master.

Peng Zu: folk one-liners

Peng Zu taboos pair one line to the day’s stem and one to the branch — e.g. a Jia day may read “do not open storehouses” and a Zi day “do not consult divination.” They share the screen with Yi/Ji in folk almanacs (通胜) but are not the same table.

Not personal chart 喜忌

Chart apps speak of unfavorable elements from birth pillars — personal. Almanac “avoid travel” and Peng Zu “do not consult divination” are public labels. Do not merge them with “avoid Fire, wear less red” on a gift card.

Read next

• Yi / Ji explained
• Lunar almanac vs BaZi calendar
• What is BaZi? Four pillars
• Match flow: color tags from birth data

You can download a beautiful lunar almanac and still not have a BaZi personal calendar. The first is a shared day planner rooted in folk timing. The second is a personal timeline built from your birth year, month, day, and hour pillars. Confusing them is how beginners think the yellow calendar “knows” their private luck — or their personal wear colors.

This page bridges Yi / Ji explained and four pillars. I compute public almanac data and personal chart logic on lushn.one.

Side-by-side

What the almanac layer gives you

On any given day the almanac answers: What is today’s day pillar? What activities are traditionally marked Yi or Ji? Millions of people see the same list. For Peng Zu one-liners on the same screen, see Yi/Ji vs Peng Zu taboos. That is useful for:

• Lunar festival dates and etiquette gifts.
• Conversation starters (“apparently today is a travel Yi day”).
• Learning heavenly stems and earthly branches on a wall calendar.

It does not know your hour pillar, your Day Master, or your favorable elements. Almanac Yi/Ji is not a personal color prescription.

What changes when you add four pillars

Once match flow (or chart software on lushn.one) computes your pillars, the system can overlay:

• Flow years (流年): how the current year pillar interacts with yours — through the same 喜用神 line, not a separate “flow year color board.”
• Flow months / days: finer slices for students and enthusiasts — still inside favorable-element judgment.
• Personalized wearable tags: which element colors echo your chart, not just the public day.

A day with two kinds of information (example)

1. Morning Check the almanac

   App says “Ji: major contracts.” You note it, maybe delay a signing. Folk habit — not your scarf color.

2. Afternoon Open match flow

   With birth time saved, your profile highlights Water tones this month for your favorable elements. Different information.

3. Gift Pick colors

   You buy a navy cord bracelet (Water color story) because it matches the personal 喜用神 tag, not because the almanac said so.

Two layers I am building toward

• Public almanac page: L1, no login — Yi/Ji and Peng Zu for everyone.
• Saved BaZi calendar: L3, requires stored pillars — flow overlays against your chart on lushn.one.

Until those ship, use the sister guides above plus match flow for personalization.

FAQ

Is the almanac “wrong” if my BaZi flow day disagrees?

They answer different questions, not right vs wrong. Almanac is public L1; flow day is personal L3 inside 喜用神 logic.

Do I need lushn.one for a paper calendar?

No. Paper is pure L1. Personal layers need software and your birth data.

How does this relate to stems and branches?

Both almanac day pillars and birth pillars use the same stem-branch vocabulary. The difference is “today only” vs “your four time coordinates.”

Read next

• Yi / Ji explained
• Yi/Ji vs Peng Zu taboos
• What is BaZi? Four pillars
• BaZi flow days & wearables
• Birth time and match depth
• Five-element wearables
• Match flow: get color tags from birth data

Open a Chinese calendar app and you will see characters like 宜 (Yi, “suitable”) and 忌 (Ji, “avoid”) beside activities — travel, haircuts, contracts, weddings. If you are new to the culture, it looks like a personal horoscope. Usually it is not. It is lunar almanac logic: the recommendation is tied to the civil day’s stem-and-branch, shared by millions of people.

This page explains how to read Yi / Ji, how that differs from BaZi charting, and where Peng Zu taboos on the same page differ — see Yi/Ji vs Peng Zu taboos. Almanac data comes from lushn.one.

Almanac Yi / Ji: about the day, not about you

When a friend says “the almanac says today is bad for signing contracts,” they mean the left column — a public timing hint. When a BaZi app comments on your wealth star or annual luck, that is the right column and needs your birth data. For a fuller side-by-side, see Lunar almanac vs BaZi calendar.

What Yi and Ji actually list

• Day stem-branch (日干支), e.g., a Jia-Wu day.
• Yi (宜): activities considered harmonious with that day’s qi in folk tradition.
• Ji (忌): activities to postpone or handle carefully.
• Often also: directional stars, clash animals, lunar mansions — depending on the publisher.

Modern software (including lushn.one almanac builders) reconstructs these lists from established tables rather than improvising per user.

Why the same day shows the same Yi / Ji for everyone

Almanac rules key off the day on Earth, not your birth chart. That is why two strangers see identical “avoid ocean travel” lines on the same date. It is community rhythm, not a personalized verdict on your life.

Heavenly stems on the calendar: not yet “your” BaZi

Seeing 天干地支 on a wall calendar teaches vocabulary used everywhere in East Asian timekeeping. Learning four pillars is learning how your birth moment snapshots those cycles.

Wearables and the almanac

Occasionally a gift ties to today’s day element color: “wear Metal tones on a Geng day.” That is festive color play for the day, not a health regimen. Deeper personalization uses your stored pillars on the match flow or read five-element wearables — not the public Yi list alone.

Beginner FAQ

Should I plan weddings only on “Yi: marriage” days?

Many families still consult almanacs out of respect for elders. Practically, venue availability matters too. Treat Yi/Ji as cultural reference.

How is Peng Zu different from Yi / Ji?

Same page, different table. See Yi/Ji vs Peng Zu taboos.

Read next

• Yi/Ji vs Peng Zu taboos
• What Is BaZi?
• Lunar almanac vs BaZi calendar
• More Eastern culture guides