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Results for "solar term"

Quick answer · Term

Is Qingming a solar term?

Yes, Qingming is one of the 24 solar terms, often associated with tomb sweeping customs in Vietnam.

From the article “What is Tiết khí?”

Calendar and astronomy

Lunar-solar converter

Convert lunar and solar dates both ways, with leap months, stems and branches and solar terms, or count days between dates.

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Dictionary › Choosing dates and hours

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.

Updated 12 Sept 2026Calendar and astronomy
Knowledge › Eastern › BaZi

How Ba Tu Major Cycles Are Set: Why They Run Forward or Backward by Gender and the Yin Yang of the Year Stem, How the Starting Age Is Counted from Days to the Nearest Solar Term (Three Days to One Year), and How to Read a Ten Year Major Cycle Together with the Annual Cycle Against the Useful God

Ba Tu major cycles are set by gender and the yin yang of the year stem, with starting age counted from days to the nearest solar term at three days per year.

Updated 25 Sept 2026Traditional systems
Knowledge › Eastern › Lunar calendar

When Does Hạ Chí Begin and What Customs Does It Have?

Hạ Chí begins when the Sun reaches 90 degrees of solar longitude; from 2012 to 2043 it falls on 21 June, Vietnam time. Start times 2025 to 2030, old customs.

Updated 16 Oct 2026Calendar and astronomy
Knowledge › Eastern › Lunar calendar

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.

Updated 16 Oct 2026Calendar and astronomy
Knowledge › Eastern › Lunar calendar

When Does Lập Xuân Begin and What Customs Mark It?

Lập Xuân, the first solar term of the year, falls on 3 or 4 February (4 February in 2026). How it is calculated, why it changes the year, and its customs.

Updated 16 Oct 2026Calendar and astronomy
Dictionary › Other

What is Nguyệt Lệnh?

Nguyệt Lệnh (月令) is the Month Pillar's Stem and Branch in BaZi, the seasonal qi of the birth month that shapes the Day Master's strength.

Updated 21 Sept 2026
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Vietnamese lunisolar calendar, 1900 to 2100

Every solar day from 1900 to 2100 with its lunar date, leap month flag, day and year stem-branch, the solar term in force and the day officer.

73,414 rowsVersion 1.2.2
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Daily hexagram by the Gua Qi method, 1900 to 2100

Every solar day from 1900 to 2100 with its ruling hexagram under the Gua Qi method (six days seven parts), the line ruling the day, the position in the sixty-hexagram cycle, the winter solstice anchor and the minutes elapsed since it, the solar term and the cardinal hexagram line for that term. Enough to recompute every row independently.

73,414 rowsVersion 1.2.1
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The 24 solar terms

The solar date each of the 24 terms begins, for every year from 2020 to 2035, computed from solar longitude in Vietnam time.

384 rowsVersion 1.1.1
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Order of the sixty Gua Qi hexagrams

The sixty hexagrams that take turns ruling the days under the Gua Qi method, in order from Inner Truth at the winter solstice, with their solar month, their rank (duke, sovereign, marquis, grand master, minister) and when each takes over counted from the solstice. The lookup table for the que-ngay-quai-khi-1900-2100 dataset.

60 rowsVersion 1.3.1
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