The Twenty-Four Solar Terms: Why the Solar Calendar Lives Inside the Lunar Almanac, and Why It Ties to Farming
The 24 solar terms are seasonal markers tied to Earth's orbit around the Sun, used as a farming guide in the lunar almanac.
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Hanoi Autumn Festival 2026 "Hanoi Autumn, A Journey of Emotions": Dates 16-18 October, Thong Nhat Park, 9 Experience SpacesHow to Arrange the Mid-Autumn Festival Offering TrayCom Lang Vong - the signature autumn delicacy of HanoiComparing Mid-Autumn Festival customs across Northern, Central, and Southern VietnamWhat Are the Origins and Meanings of the Mid-Autumn Festival in Vietnam?Autumn Keo Pagoda Festival in Hung Yen: Zen Master Khong Lo, boat racing, palanquin procession and festival schedule
When Does Lập Hạ Begin and What Customs Come With It?
Lập Hạ, the 7th solar term, opens summer when the Sun reaches 45 degrees of longitude, usually on 5 or 6 May. How it is calculated and its customs.
What Are the Origins and Meanings of the Mid-Autumn Festival in Vietnam?
Vietnam's Mid-Autumn Festival, the 8th lunar month full moon, is Children's Festival with ancestor offerings, moon-viewing trays and paper toys.
When Does Xuân Phân (Spring Equinox) Begin and What Customs Mark It?
Xuân Phân, the fourth of the 24 solar terms, starts on 20 or 21 March in Vietnam time. Exact dates to 2030, its three pentads and the customs around it.
The Hexagram of the Day According to Quái khí: What Are Six Days and Seven Parts and the Four Cardinal Hexagrams?
Quái khí maps the 60 hexagrams onto 365 days by the method of Mạnh Hỷ and Kinh Phòng, each ruling six days and seven parts.
When Does Thu Phân Begin and What Customs Mark It? A View from Sui Shi Guang Ji and Calendrical Science
Thu Phân, the 16th of the 24 solar terms, begins on 22 to 24 September as the Sun enters the Thọ Tinh station. Its calendar roots and customs, explained.
What is Tiết khí?
Solar terms are 24 markers dividing the year by the Sun's position on the ecliptic, used in East Asian calendrics to determine seasons and festivals.
What is a Sun Sign? Distinguishing It from the Astronomical Zodiac
A Sun Sign comes from the Sun's position at your birth in the tropical zodiac, which differs from the actual constellation position.
Western Astrology: The 12 Basic Zodiac Signs
The 12 zodiac signs began with Babylonian sky watching and Ptolemy's system. Precession means they no longer match the constellations.
What Is Lập Đông, When Does It Begin, and What Customs Come With It?
Lập Đông is the 19th of the 24 solar terms, marking the start of winter and usually falling on 7 or 8 November each year.
The Lunar Leap Month: Why It Exists, How It Is Calculated, and Why One Lunar Day in a Leap Year Corresponds to Two Solar Days
How a lunar leap month is determined, why leap years exist, and why one lunar day in a leap year corresponds to two solar days.
What Is Lập Thu, When Does It Begin, and What Customs Come With It?
Lập Thu, tiết khí thứ 13, đánh dấu chuyển hạ sang thu. Bài giải thích cách tính ngày, ba hậu, gốc tích trong Tuế thời quảng ký và tục lệ.
What Is Hà Lạc Numerology and How Are Hexagrams Cast from Can Chi?
Hà Lạc lý số casts a hexagram from the can chi of a birth date: the number tables, the 25 and 30 reductions, and a worked example from Học Năng's book.
