Traditional systemsBest day for a purpose
Rank the days in your chosen range for your task and your age, weighing the day officer, Tam Nương, Nguyệt Kỵ and your nạp âm element.
Start Knowledge › Eastern › Vietnamese astrologyIn the Khâm Thiên Tứ Hóa school, Hóa Kỵ is the most important of the four Hóa, not a malefic. Here is how to read Kỵ nhập, Kỵ xung and Kỵ xuyến liên.
Updated 25 Sept 2026Traditional systems
Knowledge › Eastern › I ChingThủy Hỏa Ký Tế (No. 63) is the only hexagram with all six lines in correct position and paired. It teaches small success and a good start but chaotic end.
Updated 25 Sept 2026Traditional systems
Knowledge › Eastern › I ChingHexagram 45, Tsui (Gathering Together, 萃), covers the judgment, image, and six lines on how groups form and why shared ground and trust hold them.
Updated 26 Sept 2026Traditional systems
Knowledge › Eastern › Vietnamese astrologyMệnh vô chính diệu means the Mệnh palace holds no major star. Readers borrow stars from Thiên Di, though only 70 to 80 percent carries over.
Updated 26 Sept 2026Traditional systems
Knowledge › Vietnam › Tet customsChoosing a first-foot visitor by age compatibility: folk criteria, offerings, step-by-step practice, common taboos, and the limits to keep in mind.
Updated 13 Sept 2026Culture and belief
Knowledge › Vietnam › Life-cycle ritesTuần thất is seven weekly offerings over 49 days; the 49th day is chung thất; the 100th day is tốt khốc, the end of weeping. Origins and how each is done.
Updated 11 Oct 2026Culture and belief
Knowledge › Eastern › I ChingLiu Yao timing rules from Zeng Shan Buo Yi chapter 26D: how static lines, moving lines, excessive vigor and void in the cycle each find their day.
Updated 25 Sept 2026Traditional systems
Knowledge › Western › NumerologyThe Personal Day Number comes from your birth day and month plus today's date, and it changes daily, unlike the Life Path Number.
Updated 13 Sept 2026Modern system
Knowledge › Eastern › Zodiac animalsThe Four Clashing Signs Ty, Ngo, Mao and Dau form two opposing pairs on the Earthly Branch cycle, shaped by the five elements and yin-yang rules.
Updated 19 Jun 2026Traditional systems
Knowledge › Eastern › Zodiac animalsThe Four Clashing Signs in Eastern folk belief are the Tiger, Monkey, Snake and Pig, two opposing pairs that reflect yin-yang balance.
Updated 17 Jun 2026Traditional systems
Knowledge › Eastern › Zodiac animalsThe Four Clash group Dragon, Dog, Ox, Goat pairs two opposing branches. Eastern folk belief sees conflict in business and marriage, yet growth too.
Updated 31 Aug 2026Traditional systems
Knowledge › Vietnam › Ancestor worshipThe giỗ prayer text: its structure, how to address each generation of ancestors, and the tiên thường and chính kỵ versions, with sources.
Updated 11 Oct 2026Culture and belief
Knowledge › Eastern › Feng shuiThe Five Elements' generating and overcoming cycles shape feng shui practice. Identify Metal, Wood, Water, Fire and Earth at home to balance energy.
Updated 23 Jul 2026Traditional systems
Knowledge › Vietnam › Ancestor worshipThe custom of offering a day early is called lễ tiên thường, with the main chính kỵ the next day. Its origin, distinctions and meaning.
Updated 11 Oct 2026Culture and belief
Knowledge › Vietnam › RegionsHanoi character in daily life shows in forms of address, inviting, hosting guests, and a reserve newcomers often misread as coldness.
Updated 22 Sept 2026Culture and belief
Knowledge › Vietnam › Folk taboosExplore traditional Vietnamese Tet taboos: avoiding sweeping, giving fire, breaking things... and the spiritual meanings behind these customs.
Updated 19 Jun 2026Culture and belief
Knowledge › Vietnam › Folk taboosFolk taboos for offerings on the Full Moon and the first day of the lunar month, from choosing fruit and flowers to the incense burner and a reverent mindset.
Updated 30 Jun 2026Culture and belief
Knowledge › Eastern › Feng shuiApply the Five Elements to pick a wedding date, weighing the couple's destiny elements against the day's element for a harmonious start.
Updated 3 Aug 2026Traditional systems
Knowledge › Eastern › BaZiBa Tu reads marriage through the spouse star and the spouse palace at the day branch, plus how that branch combines or clashes with major and annual luck.
Updated 25 Sept 2026Traditional systems
Knowledge › Eastern › Lunar calendarTwo calendars can give different lunar dates for the same solar day because they use different legal time zones, such as Vietnam at UTC+7 and China at UTC+8.
Updated 13 Sept 2026Calendar and astronomy
Knowledge › Western › NumerologyThe universal day number comes from the shared calendar date, while the personal day number adds your birth day and month.
Updated 13 Sept 2026Modern system
Knowledge › Eastern › Tam ThứcIn Kỳ Môn Độn Giáp, Tam Kỳ are Ất, Bính, Đinh, while Lục Nghi are Mậu, Kỷ, Canh, Tân, Nhâm, Quý. Each of the six Giáp hides under one Lục Nghi stem.
Updated 25 Sept 2026Traditional systems
Knowledge › Vietnam › Traditional craftsDong Ho folk painting, a 500-year craft in Bac Ninh, uses woodblock printing and natural colors. UNESCO listed it as heritage in need of urgent safeguarding.
Updated 13 Aug 2026Culture and belief
Knowledge › Eastern › Tam ThứcCửu Tinh in Kỳ Môn Độn Giáp are nine stars from Thiên Bồng to Thiên Anh, each tied to a palace and element, while Bát Thần are eight spirits.
Updated 25 Sept 2026Traditional systems
Knowledge › Vietnam › Folk beliefThree early 20th century recorders found fortune telling, day selection and mediumship widespread in northern Vietnam, each seeing them differently.
Updated 28 Sept 2026Culture and belief
Knowledge › Western › Philosophy of scienceThe numerology system that reads core numbers from names and birth dates took shape in America in the early 20th century with L. Dow Balliett.
Updated 27 Sept 2026
Knowledge › Vietnam › Ancestor worshipGiỗ thường (cát kỵ) yearly rites need no full feast like giỗ đầu or giỗ hết. Core offerings: hương đèn, trầu cau, rượu trà, a bowl of upside-down rice.
Updated 11 Oct 2026Culture and belief
Knowledge › Eastern › Tam ThứcKỳ Môn Độn Giáp casts a chart for a moment to assess fortune and misfortune. A full chart stacks four plates on the nine palaces of the Lạc Thư grid.
Updated 25 Sept 2026Traditional systems
Knowledge › Eastern › I ChingMai Hoa Dịch Số casts a hexagram from the lunar year, month, day, and hour: divide by 8 for the trigrams and by 6 for the moving line.
Updated 25 Sept 2026Traditional systems
Knowledge › Eastern › Tam ThứcTam Thuc covers Thai At, Ky Mon Don Giap and Luc Nham, three ancient divination methods for state affairs, actions and specific matters.
Updated 25 Sept 2026Traditional systems
Knowledge › Vietnam › Ancestor worshipThe gio day is an annual memorial rite held on the lunar death date of a family member. This article explains its origin, meaning, and how it is understood.
Updated 11 Oct 2026Culture and belief
Knowledge › Eastern › BaZiHow the four Earthly Branches in a Ba Tu chart combine, clash, punish, or harm one another, read by palace position and links to Dai Van and Luu Nien.
Updated 25 Sept 2026Traditional systems
Knowledge › Western › PsychologyFriday the 13th stock studies give conflicting results, and any effect is tiny. Vietnamese lunar bad days have not been studied the same way.
Updated 28 Sept 2026
Knowledge › Vietnam › Vietnamese commemorative daysVietnam Book and Reading Culture Day on April 21: origins from Decision 1862/QD-TTg in 2021, honoring books, readers, and reading culture.
Updated 2 Jul 2026Culture and belief
Knowledge › Vietnam › Vietnamese commemorative daysVietnam Entrepreneurs' Day on October 13 was recognized in 2004, tracing back to Ho Chi Minh's 1945 letter to the industrial and commercial sectors.
Updated 21 Jun 2026Culture and belief
Knowledge › Vietnam › Vietnamese commemorative daysWorld Environment Day on June 5 was designated by the UN General Assembly in 1972 and is led by UNEP. Learn about its history, purpose and significance.
Updated 29 Aug 2026Culture and belief
Knowledge › Vietnam › Vietnamese commemorative daysVietnam Family Day on June 28 was established by Decision 72/2001/QD-TTg to honor family values and promote warm, equal, and happy households.
Updated 9 Sept 2026Culture and belief
Knowledge › Vietnam › Vietnamese commemorative daysThe International Day of Older Persons on October 1 was established in 1990 by UN Resolution 45/106. Learn its origin, meaning, and how Vietnam observes it.
Updated 22 Jul 2026Culture and belief
Knowledge › Vietnam › Vietnamese commemorative daysVietnam Teachers' Day on November 20 originates from the 1957 Charter of Teachers initiated by FISE and was officially recognized in Vietnam in 1982.
Updated 15 Aug 2026Culture and belief
Knowledge › Vietnam › Vietnamese commemorative daysVietnam Doctors' Day (February 27) traces back to Ho Chi Minh's 1955 letter to a health cadres conference. Learn its origin, three teachings, and meaning.
Updated 9 Jul 2026Culture and belief
Knowledge › Vietnam › Traditional festivalsLang Son's Ky Cung and Ta Phu Temple Festivals run from the 22nd to the 27th of the first lunar month, when the Quan Lon Tuan Tranh palanquin returns.
Updated 27 Sept 2026Culture and belief
Knowledge › Vietnam › Historical figuresThe Ky Yen festival at Thoai Ngoc Hau communal house in An Giang honors the Nguyen dynasty mandarin who dug the Vinh Te Canal.
Updated 10 Sept 2026Culture and belief
Knowledge › Vietnam › Folk taboosVietnamese wedding taboos include age compatibility and the bride not looking back. Experts say happiness depends on mutual understanding.
Updated 26 Jun 2026Culture and belief
Knowledge › Vietnam › Folk taboosVietnamese folk taboos for opening a business include choosing auspicious dates, avoiding the ghost month and holding opening rituals.
Updated 13 Sept 2026Culture and belief
Open dataEvery solar day across ten years, showing whether it falls on Tam Nuong, Nguyet Ky, Sat Chu or Tho Tu, with the lunar date and stem-branch for checking.
3,652 rowsVersion 1.1.1
Open dataThe twelve double-hours of each day across the sixty-day stem-branch cycle, marking which are auspicious. Sixty times twelve is seven hundred and twenty rows, one full cycle.
720 rowsVersion 1.1.1