What Is Decanal Journaling? The 36-Star Calendar and the Practice

A decanal journal is a journal organized in 10-day cycles instead of 7-day weeks. Each cycle is anchored to a bright fixed star. There are 36 of them, plus five days outside the count, and together they cover the year.

The practice didn't start with me. It started in ancient Egypt, more than four thousand years ago, when priests divided the night sky into 36 strips and used the heliacal risings of bright stars to mark time. The stars were the clock. The clock was the calendar. The calendar was how you knew where you stood in the year.

I'm using the same skeleton, modernized. The book that documents it is The Decan Log. This page is the short version, written for someone who arrived here from a search and wants to know what "decanal journaling" means before deciding whether to keep reading.

The thirty-six stars

The year breaks cleanly into 36 ten-day cycles. Each cycle is named after a star you can actually observe in the sky. Hamal, the lead star of Aries, opens the year at the spring equinox, the way Aries does in the traditional zodiac. Sothis, the dog star, closes it.

The whole year, star by star. Each star links to its chapter in the book, and the last column links to the journal entry I wrote while living that decan.

Decan	Star	Dates	Theme	Journal entry
1	Hamal	Mar 20-29	Vital Spark and Rebirth	read
2	Aldebaran	Mar 30 to Apr 8	Foundation and Endurance	read
3	Elnath	Apr 9-18	Expansion and Boldness	read
4	Menkalinan	Apr 19-28	Guidance and Structure	read
5	Capella	Apr 29 to May 8	Protection and Renewal	read
6	Alhena	May 9-18	Communication and Intellect	read
7	Pollux	May 19-28	Duality and Relationship	read
8	Procyon	May 29 to Jun 7	Loyalty and Courage	read
9	Sirius	Jun 8-17	Power and Clarity	read
10	Canopus	Jun 18-27	Navigation and Purpose	read
11	Regulus	Jun 28 to Jul 7	Sovereignty and Heart	read
12	Denebola	Jul 8-17	Reform and Intuition	read
13	Spica	Jul 18-27	Artistry and Perfection	read
14	Arcturus	Jul 28 to Aug 6	Wisdom and Guidance	read
15	Zubeneschamali	Aug 7-16	Balance and Justice	not yet
16	Antares	Aug 17-26	Transformation and Willpower	not yet
17	Shaula	Aug 27 to Sep 5	Secrets and Depth	not yet
18	Nunki	Sep 6-15	Knowledge and Direction	not yet
19	Altair	Sep 16-25	Vision and Speed	not yet
20	Deneb	Sep 26 to Oct 5	Creativity and Transcendence	not yet
21	Vega	Oct 6-15	Harmony and Beauty	read
22	Fomalhaut	Oct 16-25	Clarity and Renewal	read
23	Scheat	Oct 26 to Nov 4	Innovation and Risk	read
24	Markab	Nov 5-14	Foundation and Legacy	read
25	Enif	Nov 15-24	Aspiration and Vision	read
26	Alpheratz	Nov 25 to Dec 4	Liberation and Empathy	read
27	Mirach	Dec 5-14	Reflection and Compassion	read
28	Algol	Dec 15-24	Renewal through Challenge	read
29	Alderamin	Dec 25 to Jan 3	Leadership Through Authority	read
30	Polaris	Jan 4-13	True North	read
31	Betelgeuse	Jan 14-23	Power and Creation	read
32	Rigel	Jan 24 to Feb 2	Manifestation and Mastery	read
33	Bellatrix	Feb 3-12	Will and Strategy	read
34	Alnilam	Feb 13-22	Continuity and Legacy	read
35	Mintaka	Feb 23 to Mar 4	Alignment and Truth	read
36	Sothis	Mar 5-14	Completion and Rebirth	read
	Epagomenal days	Mar 15-19	Outside the count	read

Dates are for a common year.

After Decan 36 come the five epagomenal days, the days that "fall outside the count." Egyptians treated them as outside-the-system time, neither part of the year that ended nor the one beginning. The book has its own chapter on them.

Thirty-six tens plus five gives 365. The arithmetic is older than every other calendar still in use.

Why ten days instead of seven

The seven-day week isn't aligned with anything physical. It comes from Babylonian astronomy assigning planets to days, and the pattern stuck because it was practical for trade. Useful, but arbitrary. Seven days isn't long enough for a theme to develop, integrate, and clear. By the time you've settled into a rhythm, the weekend resets it.

Ten days behaves differently. A decan has room for a beginning, a middle, and an end. You can run a small project across one. You can read most of a book inside one. You can let a question sit, work, and resolve.

The three-phase rhythm I use inside each decan is:

Initiate (days 1–3): set the question, the project, the focus.
Flow (days 4–7): do the work without re-litigating the choice.
Reflect (days 8–10): write what happened, decide what carries.

It maps cleanly onto how attention actually moves. The work week / weekend split doesn't.

Why anchor to stars

You could divide the year into 10-day blocks and not name them after anything. That works as a schedule. It doesn't work as a frame.

Each star carries a real astronomical fact: a temperature, a distance in light-years, a stellar type, a position in a constellation. Denebola's photons left in 1989. Alpheratz is 97 light-years away. Hamal is an orange giant on the helium-burning side of its life. Those aren't metaphors. They're context. They give a decan a physical weight that a numbered calendar slot doesn't have.

The star also gives the decan a name you can remember. "Decan 11, Regulus" sticks in a way that "the fourth quarter of the third trimester" does not. The naming convention is part of what makes the practice durable.

This is not astrology. There's no claim that the star influences events on Earth, or that the decan's themes are predictions. The themes are reference frames. Hamal's "clean start" theme exists because Hamal leads Aries, the sign that traditionally opens the year at the spring equinox (precession has since carried the equinox sun into Pisces), not because the photons from a star 66 light-years away have causal power over your decision-making. Big distinction. Pale Blue Dot is the cosmic-perspective frame; this is the calendrical one.

What the practice actually looks like

The journal entry on the first day of a decan opens with:

The star, its astronomical facts, its archetypal theme
A question or focus for the ten days
What the previous decan closed with that's still active

The middle days are normal journaling, but with the awareness that this decan has a shape and a name. The closing day or two:

What happened
What carried over
What gets passed to the next star

You can see the pattern in real entries. Decan 23 Scheat, Decan 24 Markab, Decan 25 Enif. Same shape, different content, in sequence.

After a year of this, you have 36 short essays organized by star, plus the five outside-time days, plus whatever else accumulated in the freewriting pages. The structure does most of the work of remembering for you. Over a full turn of the wheel the entries stop being a diary and start being evidence, a map of the year you actually lived. My own run began mid-cycle, at Alderamin, and came around to Hamal.

What this is not

Not astrology. No claim that stars cause anything. The stars are reference points.
Not a productivity system. It doesn't optimize output. It frames attention.
Not religious. The Egyptian origin is historical, not devotional.
Not a replacement for the Gregorian calendar. Pay your bills on the calendar everyone else uses. The decanal cycle runs alongside, on top, underneath.
Not new. It is more than four thousand years old. I'm relearning what was already known.

Where to begin

If you want the full framework, start with The Decan Log, the book. The introduction chapter (Living by the Stars) covers everything above in more depth, including the math, the history, and the practice.

If you'd rather sample first:

The full journal feed is every decan entry in order. The table above shows which stars have one so far.
The book's individual star chapters are at /books/the-decan-log/<star>/. The clearest entry points are Hamal (the year-opening star), Sothis (the year-closing one), and Epagomenal Days (the five outside-time days at the end).

The Decan Log book pairs with People of the Stars, the broader temporal framework. POTS is about using astronomical time as a non-human clock for decision-making; decanal journaling is the daily practice that operates on top of that clock. Both sit under Coherent Complexity: the decan log is where the texture of a given day gets read and recorded instead of theorized.

Continue reading

What Is People of the Stars?, the framework underneath the practice
The Decan Log book, the full 36-chapter framework
Decan 1: Hamal and a Clean Start, the first journal entry
Epagomenal Days: Five Days Outside Time, the year's closing
All decan journal entries, the running practice