Auspicious hours across the sixty-day stem-branch cycle

What the columns mean

id (string)

Stable row identifier, unchanged across versions

can_chi_ngay (string)

Sexagenary cycle of the day, sixty values

chi_ngay (string)

Earthly branch of the day only, i.e. the one that determines the hour table

chi_gio (string)

Earthly branch of the time slot

khung_gio (string)

Time slot in 24-hour clock

hoang_dao (string)

co when this time slot is a hoang dao hour, khong otherwise

nguon (string)

Kind of source for this row, one or more parts separated by semicolons, each being tinh-toan (computed by the engine), quy-uoc-truyen-thong, quy-uoc-he-hien-dai (convention of a tradition or of a modern system), van-ban (with the work after a colon) or bien-tap (with details); static details are also in the metadata nguon_chi_tiet, and the two largest datasets give them only there; which column belongs to which part is given by each column's loai_bang_chung in the metadata

ghi_chu (string)

Where the schools disagree on this row; empty when they do not

Release

Data release ID

2026.10.27-cd6fca71 · manifest.json

Dataset version

1.1.1

Dataset last changed

2026-09-30The date in the release ID is when the most recently changed dataset of the whole release changed. This dataset has not changed since the date above, so it keeps its version and is still part of this release.

Generated

2026-10-27 08:07 UTC

Rows

720 rows, 8 columns

Schema hash

9224d1cf823be322…Copysha256 of each column's name and type

Download this exact release

• gio-hoang-dao-60-ngay.csv · 59.1 KB · sha256 baaea2be7cb150e4…Copy
• gio-hoang-dao-60-ngay.json · 168 KB · sha256 234809348687f191…Copy
• gio-hoang-dao-60-ngay.meta.json · 18.9 KB · sha256 644a5350e66f79ef…Copy

The “CSV for Excel” button at the top serves a copy with a BOM, so its hash differs from the CSV here.

Changes

Version 1.1.1 (2026-09-30), type provenance: Metadata adds source_ids (source register nguon-thu-tich.csv), rule_ids (rule register quy-tac.json), danh_muc_tu_vung_nguon (the eight kinds of the nguon column with their English equivalents), a per-column epistemic_status and danh_muc_epistemic_status; the data is unchanged byte for byte. Metadata declares mui_gio Asia/Ho_Chi_Minh and the mui-gio convention.

Changelog of every dataset (CHANGELOG on GitHub)

Method

This dataset goes through no calendar model.

Engine version of the release: 2.0.0.

Verification

Invariants checked on the released file itself:

• chi_ngay is fully determined by can_chi_ngay
• khung_gio is fully determined by chi_gio
• hoang_dao is fully determined by chi_ngay, chi_gio; repeats every 12 steps of can_chi_ngay

Evidence types in this dataset, and how far each can be checked:

• A. Recomputable: an astronomical, calendrical or arithmetic algorithm yields the value, anyone with the algorithm can recompute it, and the engine has been checked against independent sources where they exist (model profile).
• C. Convention of a tradition or of a modern system: correct by that convention, neither true nor false in an empirical sense; where schools differ is recorded in the diem-bat-dong-giua-cac-phai dataset.

Provenance

Traditional lookup rules applied by the engine to computed dates, years or stem-branch pairs, producing a table no book prints as such.

• A. Recomputable: can_chi_ngay, chi_ngay, chi_gio
• C. Convention of a tradition or of a modern system: khung_gio, hoang_dao

Reuses content from: 12-dia-chi.

Cite this dataset

Nhật Nguyệt (2026). Auspicious hours across the sixty-day stem-branch cycle (version 1.1.1, data release 2026.10.27-cd6fca71) [Data set]. CC BY 4.0. DOI 10.5281/zenodo.23009396. https://nhatnguyet.org/en/bang/gio-hoang-dao-60-ngayCopy

The concept DOI always resolves to the latest release. Zenodo mints a DOI for each release after it is published, and the next release records it in the manifest.

Licence and limitations

Released under CC BY 4.0: reuse commercially, adapt freely, attribution is all that is asked.

Source: Nhật Nguyệt (nhatnguyet.org), CC BY 4.0

This dataset records cultural and calendrical conventions, not scientific claims. It is suitable for cultural research, NLP, and calendar applications. It is not intended for predicting events, evaluating people, or making decisions that affect anyone.

Other reference tables

• The ten heavenly stems
• Compatibility matrix of the 12 earthly branches
• The twelve earthly branches
• The twelve day officers (Thap Nhi Truc)
• The 22 Major Arcana of the Tarot
• The 24 solar terms
• The 56 Minor Arcana cards
• Sexagenary cycle table (60 Hoa Giap)
• The 64 hexagrams of the I Ching
• The nine presiding stars (Cuu Dieu)
• Zodiac sign boundaries year by year, 1950 to 2050
• Retrieval evaluation set for Vietnamese folk belief and calendar
• Letter to number tables, Pythagorean and Chaldean
• Kua number and Bat Trach directions
• Where the schools disagree
• The sixty stem-branch pairs crossed: sounds, harmony, clash and element relation
• Questions and answers on Vietnamese offering rites
• Things to avoid and practical notes for Vietnamese offering rites
• Vietnamese festivals mapped to solar dates, 2026 to 2030
• Festivals and folk beliefs of the 54 ethnic groups of Vietnam
• Vietnamese festivals, seasonal feasts and public holidays
• Vietnamese ritual offerings
• Vietnamese lunisolar calendar, 1900 to 2100
• Types of Vietnamese offering rites
• Start moments of the 24 solar terms, 1900 to 2100
• Folk inauspicious days mapped onto solar dates, 2026 to 2035
• Vietnamese offering procedures
• Daily hexagram by the Gua Qi method, 1900 to 2100
• Tam Tai, Kim Lau and Hoang Oc by birth year and year in question
• Order of the sixty Gua Qi hexagrams
• Segments of the three Lo Ban rules
• Vietnamese offering prayers (văn cúng)

See every reference table