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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No. Lập Thu is calculated from the Sun's position on the ecliptic, while the first day of the seventh lunar month is calculated from the lunar cycle. The two markers coincide only in some years, and even when they coincide it is a coincidence. In 2026, Lập Thu falls on the 25th day of the sixth lunar month, quite far from the first day of the seventh month.
From the article “What Is Lập Thu, When Does It Begin, and What Customs Come With It?”
See the lunar date, stems and branches, auspicious hours and holidays for today or any day.
Convert lunar and solar dates both ways, with leap months, stems and branches and solar terms, or count days between dates.
Name ideas for your baby from the Bát Tự chart, each with a reason, plus scores for your own picks.
Rank all 60 ages to choose a New Year first visitor, with actual birth years and reasons.
Check a building year for Kim Lâu, Hoang Ốc and Tam Tai, and find a year clear of all three.
Ghost Month in the 7th lunar month: its origins, common folk taboos, and the Buddhist view of Vu Lan as a season of gratitude and filial piety.
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.
The main Vu Lan rite falls on lunar 7/15; cô hồn offerings run from the 10th until before noon on the Rằm, often on the 14th evening.
Two 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.
Lunar to solar conversion uses no fixed addition table. It relies on the new moon point, major solar terms and legal time zones, so it differs year by year.
The Hungry Ghost Festival on the 15th day of the 7th lunar month blends Buddhist and Taoist roots, with offerings for wandering spirits.
The Neu pole is raised on the 23rd of the twelfth lunar month and lowered on the 7th of the first month, closing Tet. Its origins, meaning.
The 15th day of the 7th lunar month has three offering trays: a vegetarian tray for Buddha, a full tray for ancestors, and one for wandering souls.
Tết Đoan Ngọ falls at noon on the 5th day of the 5th lunar month, when folk belief says yang energy peaks. The bug-killing custom and ancestor worship.
Folk 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.
Tet Doan Ngo worship tray guide: offerings like fermented rice and tro cakes, step-by-step arrangement following regional customs, plus safety notes.
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.
The ông Công ông Táo ceremony on the 23rd of the 12th lunar month sends the three Kitchen Gods to heaven to report on the family's deeds to the Jade Emperor.
Cửu Độc: nine days of the fifth lunar month (5-7, 15-17, 25-27). What the Kinh Sở tuế thời ký says, what is avoided, and solar dates for 2026 to 2030.
Tet Ha Nguyen on the 15th day of the tenth lunar month is one of Vietnam's four major traditional festivals, a time to thank heaven and earth.
The Sóc day opens the lunar month. Vietnamese worship ancestors and deities for a smooth month, a custom rooted in yin-yang philosophy.
The Lam Chay Festival in Tam Vu, Tay Ninh runs on the 15th and 16th of the first lunar month, with rituals welcoming Ong Tieu and more.
Banh Troi and Banh Chay mark Vietnam's Cold Foods Festival on the 3rd day of the 3rd lunar month, a localized day of honoring ancestors with these cakes.
Rằm tháng 7 prayers include three texts for deities, ancestors, and wandering souls, with ritual order, offerings, and how to recite them.
Vía Ngọc Hoàng falls on the 9th day of the first lunar month. How people worship at Chùa Ngọc Hoàng in Ho Chi Minh City, and the temple's history.
The 10th day of the first lunar month is when many Vietnamese, especially in the South, worship the God of Wealth to pray for a good year.
The Tay Thien Festival runs from the 15th to the 17th of the second lunar month in Dai Dinh Commune, Phu Tho Province, honoring National Mother Lang Thi Tieu.
The First Lunar Month full moon runs from the 14th night to the end of the 15th; families may offer on the 14th evening or 15th morning, sincerely.
How to prepare the offering tray and perform the Kitchen Gods' ritual on the 23rd of the twelfth lunar month, following regional customs.
Why Buddha's Birthday falls on the 8th or the 15th of the fourth lunar month, and how the Vietnam Buddhist Sangha holds Vesak Week each year.
Northern Vietnamese Tet worship runs from seeing off the Kitchen Gods on the 23rd of the 12th lunar month to welcoming ancestors and the vang ma burning rite.
Is offering the First Full Moon on the 13th or 14th lunar day acceptable, where does the early custom come from, and what should the tray include?
The Vietnamese lunar calendar is actually a lunisolar calendar combining the moon's phases and Earth's orbit around the Sun.
Ong Hoang Muoi Temple Festival in Nghe An holds its main ceremony on the 10th day of the tenth lunar month, tied to Mother Goddess worship.
How to set out Ram thang Gieng (first full moon) offering trays at home: how many trays, vegetarian or savory dishes, order of offering, layout and taboos.
Dinh Cau Phu Quoc Festival falls on the 15th and 16th of the 10th lunar month, with Nghinh Cau, Yet Cau and Chinh Te rituals honouring Chua Ngoc Nuong Nuong.
Sinh Village wrestling festival in Lai An Village, Hue, falls on the 10th day of the first lunar month and follows the muddy back, white belly rule.
The Rước cộ Bà Chợ Được Festival honours Bà at her shrine in Phước Ấm hamlet, Thăng An commune, Đà Nẵng, around the 11th day of the first lunar month.
Nghinh Ong Lai Son Festival falls on the 15th and 16th days of the 10th lunar month at Lang Ong Nam Hai, Hon Son Island, Kien Hai, An Giang.
Tuổi mụ is the Vietnamese lunar way of counting age: current year minus birth year, plus one, and folk calculations use this number.
Hien Quan Phet Festival in Phu Tho runs on the 12th and 13th of the first lunar month with palanquin procession, worship, troop march, and phet grabbing.
The Cold Food Festival on the 3rd day of the 3rd lunar month became a Vietnamese day for offering bánh trôi and bánh chay to ancestors.
The Tay new rice festival on the 10th day of the tenth lunar month in Thai Nguyen includes family offerings and a village ceremony.
Dinh Thầy Thím Festival runs from the 14th to the 16th of the Ninth Lunar Month with spirit welcoming, cộ bánh offerings, Thỉnh sanh, and Tiền hiền rites.
Tet Nguyen Tieu, the first full moon of the lunar year, is greatly valued in Vietnamese culture. See why it matters and what to prepare for the offering tray.
The Công Đồng Bắc Lệ Temple Festival in Tân Thành Commune, Lạng Sơn runs from the 18th to 20th of the 9th lunar month, with the palanquin bathing rite.
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