Sunday, January 21, 2029 corresponds to Lunar Day 7, Month 12 of the Wu Shen (Monkey) year under the official Vietnamese UTC+7 astronomical standard. The Four Pillars of the day are Year Wu Shen, Solar-Term Month Yi Chou, and Day Xin Hai (Hairpin Bracelet Metal (Chai Chuan Jin)), governed by Day Officer Open (Kai) and Lunar Mansion Hairy Head (Mao). The Sun stands at 301.44 degrees ecliptic longitude within the Major Cold (Dahan) solar term, with Start of Spring (Lichun) arriving on Feb 03, 2029 at 20:20 (UTC+7). The six Auspicious Hours (Yellow Path) are Chou (01h-03h), Chen (07h-09h), Wu (11h-13h), Wei (13h-15h), Xu (19h-21h), Hai (21h-23h); favorable departure directions are Southwest for the Joy Spirit and Southwest for the Wealth Spirit. Traditional caution notes apply for Tam Nuong Taboo Day.
Complete diurnal breakdown of the twelve two-hour Earthly Branch periods, their Stem-Branch pillars, and Twelve Guardian Spirits.
| Earthly Branch | Clock Time (UTC+7) | Hour Pillar | Guardian Spirit | Classification |
|---|---|---|---|---|
| Zi (Rat) | Wu Zi | White Tiger (Bai Hu) | Inauspicious (Black Path) | |
| Chou (Ox) | Ji Chou | Jade Hall (Yu Tang) | Auspicious (Yellow Path) | |
| Yin (Tiger) | Geng Yin | Heavenly Prison (Tian Lao) | Inauspicious (Black Path) | |
| Mao (Rabbit) | Xin Mao | Black Tortoise (Xuan Wu) | Inauspicious (Black Path) | |
| Chen (Dragon) | Ren Chen | Life Governor (Si Ming) | Auspicious (Yellow Path) | |
| Si (Snake) | Gui Si | Grappling Hook (Gou Chen) | Inauspicious (Black Path) | |
| Wu (Horse) | Jia Wu | Azure Dragon (Qing Long) | Auspicious (Yellow Path) | |
| Wei (Goat) | Yi Wei | Bright Hall (Ming Tang) | Auspicious (Yellow Path) | |
| Shen (Monkey) | Bing Shen | Heavenly Punishment (Tian Xing) | Inauspicious (Black Path) | |
| You (Rooster) | Ding You | Vermilion Bird (Zhu Que) | Inauspicious (Black Path) | |
| Xu (Dog) | Wu Xu | Golden Coffer (Jin Gui) | Auspicious (Yellow Path) | |
| Hai (Pig) | Ji Hai | Precious Light (Bao Guang) | Auspicious (Yellow Path) |
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Convert any date between 1900 and 2100 (including Leap Months) or generate a 10-year Gregorian schedule with automatic 29-day short-month handling and 1-click Calendar (.ics) export.
| Lunar Year | Observed Lunar | Gregorian Date | Weekday | Day Pillar | Month-Length Note |
|---|
Enter your name, birth year, and gender to inspect daily compatibility, unlock your Eight Mansions auspicious directions, and save a high-resolution full-month calendar image customized specifically for you or any family member.
Full breakdown of Auspicious & Inauspicious Stars, Dong Gong commentary, Master Nguyen Binh Khiem verse, Li Chunfeng travel hours, Kongming Six Stars, and Peng Zu Hundred Taboos.
Vermilion red indicates auspicious days; charcoal indicates caution days. When your birth year is entered above, green stars mark Personal Match days and dark badges mark Clash days.
Evaluates Sixfold Clash, Harmony, Harm, and Void (Kong Wang) against the selected Day Pillar.
Grand Duke (Tai Sui), Year Breaker (Sui Po), Three Killings (San Sha), and Five Yellow (Wu Huang) sectors for construction and groundbreaking.
NOAA sunrise, solar noon, and sunset for Hanoi and Ho Chi Minh City, lunar illumination, and upcoming New/Full Moons.
Classical five-day ecological micro-seasons dividing each of the 24 Solar Terms into First, Second, and Third Pentads.
Spring and neap tidal regimes by lunar age across Northern, Central, and Southern Vietnamese waters.
Filter the upcoming 60 days by task category using Twelve Day Officers, Twenty-Eight Mansions, and taboo exclusions.
| # | Solar Term | Solar Longitude | Exact Transition (UTC+7) | Classification | BaZi Month |
|---|---|---|---|---|---|
| 1 | Minor Cold (Xiaohan) | 285° | Sectional Term (Jie) | Chou | |
| 2 | Major Cold (Dahan) | 300° | Principal Term (Qi) | ||
| 3 | Start of Spring (Lichun) | 315° | Sectional Term (Jie) | Yin | |
| 4 | Rain Water (Yushui) | 330° | Principal Term (Qi) | ||
| 5 | Awakening of Insects (Jingzhe) | 345° | Sectional Term (Jie) | Mao | |
| 6 | Vernal Equinox (Chunfen) | 0° | Principal Term (Qi) | ||
| 7 | Pure Brightness (Qingming) | 15° | Sectional Term (Jie) | Chen | |
| 8 | Grain Rain (Guyu) | 30° | Principal Term (Qi) | ||
| 9 | Start of Summer (Lixia) | 45° | Sectional Term (Jie) | Si | |
| 10 | Grain Buds (Xiaoman) | 60° | Principal Term (Qi) | ||
| 11 | Grain in Ear (Mangzhong) | 75° | Sectional Term (Jie) | Wu | |
| 12 | Summer Solstice (Xiazhi) | 90° | Principal Term (Qi) | ||
| 13 | Minor Heat (Xiaoshu) | 105° | Sectional Term (Jie) | Wei | |
| 14 | Major Heat (Dashu) | 120° | Principal Term (Qi) | ||
| 15 | Start of Autumn (Liqiu) | 135° | Sectional Term (Jie) | Shen | |
| 16 | End of Heat (Chushu) | 150° | Principal Term (Qi) | ||
| 17 | White Dew (Bailu) | 165° | Sectional Term (Jie) | You | |
| 18 | Autumnal Equinox (Qiufen) | 180° | Principal Term (Qi) | ||
| 19 | Cold Dew (Hanlu) | 195° | Sectional Term (Jie) | Xu | |
| 20 | Frost Descent (Shuangjiang) | 210° | Principal Term (Qi) | ||
| 21 | Start of Winter (Lidong) | 225° | Sectional Term (Jie) | Hai | |
| 22 | Minor Snow (Xiaoxue) | 240° | Principal Term (Qi) | ||
| 23 | Major Snow (Daxue) | 255° | Sectional Term (Jie) | Zi | |
| 24 | Winter Solstice (Dongzhi) | 270° | Principal Term (Qi) |
Journalists, researchers, and webmasters may embed the live UK Master Vietnamese UTC+7 Almanac badge or query our public JSON endpoint with attribution.
Clarifying meridian differences, 29-day lunar New Year's Eves, Lichun solar-year boundaries, and True Solar Time.
Traditional lunisolar calendars anchor the 1st day of each lunar month (Shuo) to the calendar day containing the astronomical New Moon in the country's official meridian. Vietnam uses UTC+7 (105 degrees East), whereas Beijing, Taipei, Hong Kong, and Singapore use UTC+8 (120 degrees East). Whenever an astronomical New Moon occurs between 23:00 and 23:59 UTC+7, it is already past midnight (00:00 to 00:59) the next day in UTC+8. For example, on February 2, 2030, Vietnam celebrates Lunar New Year (Day 1, Month 1) one full day ahead of UTC+8 calendars (February 3, 2030).
A lunar synodic month averages 29.53059 days, meaning lunar months alternate between 29 days (short month) and 30 days (full month) based on true sun-moon conjunctions. Due to elliptical orbital mechanics between 2025 (Yi Si) and 2032 (Ren Zi), the 12th lunar month spans exactly 29 days for eight consecutive years, so Lunar New Year's Eve falls on the 29th of the 12th month until 2033.
In classical Four Pillars of Destiny (BaZi), Nine-Palace Flying Star Feng Shui, and Qi Men Dun Jia, the solar-term year transitions at the exact astronomical minute when the Sun reaches 315 degrees ecliptic longitude, known as Start of Spring (Lichun), rather than on Lunar New Year Day. For example, Start of Spring in 2027 occurs on February 4, 2027 at 08:46 UTC+7, two days before Lunar New Year (February 6, 2027).
Civil calendar dates begin at 00:00 midnight, whereas classical horary metaphysics begins the new diurnal cycle at 23:00 (the start of the Zi Rat double-hour). Our engine displays both clearly: civil calendar lookups preserve the midnight boundary, while the Four Pillars (BaZi) and Nine-Palace Flying Stars advance the Day Pillar at 23:00 to match UK Master chart engines.
Standard civil clocks use broad political timezones and Daylight Saving Time, which can deviate from the Sun's true local meridian transit by 15 to over 90 minutes. True Solar Time adjusts civil clock time by 4 minutes per degree of longitude from the standard meridian plus the daily astronomical Equation of Time (ranging from minus 14 to plus 16 minutes), preventing incorrect Hour Pillar assignments.
Our astronomical engine implements Jean Meeus's solar longitude series (Astronomical Algorithms, Chapter 25) with Espenak-Meeus dynamical Delta-T corrections and VSOP87 harmonic calibration tables spanning 1900 through 2100, solving via Newton-Raphson iteration for exact 15-degree solar ecliptic multiples.
Under traditional Vietnamese liturgical custom, when a recurring commemoration or birthday falls on the 30th day of a lunar month, and that lunar month in a given year is a 29-day short month, the observance is held on the final day of that lunar month (the 29th), never pushed into the 1st day of the following month.
Date selection follows a three-tier hierarchy from classical compendiums: first avoid major monthly taboos and personal zodiac clashes with the Day Branch; second align the Twelve Day Officer and Twenty-Eight Lunar Mansion with the specific undertaking (marriage, groundbreaking, grand opening, or travel); third execute the event within one of the six Auspicious Hours of that day.