[{"data":1,"prerenderedAt":267},["ShallowReactive",2],{"article:new-moon-full-moon-lunar-month:en":3,"article-topic:bazi:en":123,"related-articles:en:bazi:new-moon-full-moon-lunar-month:bazi-four-pillars":244},{"slug":4,"title":5,"description":6,"category":7,"topicSlug":8,"legacyPath":9,"authorId":10,"publishedAt":11,"updatedAt":11,"noindex":12,"summary":13,"sections":14,"references":93,"relatedTools":116,"seo":118},"new-moon-full-moon-lunar-month","Why the Full Moon Is Often on the 16th: 初一, 十五 and the 29.53-Day Month","A lunar month starts on 初一, the day that contains the new moon. In 2026 the full moon falls on 十五 three times, on 十六 six times and on 十七 twice — here is the arithmetic behind 十五的月亮十六圆.","BaZi","bazi","","chen-jun","2026-10-17",false,"初一 is not a phase you can see; it is the calendar day that contains the new-moon instant. This article separates the three things usually treated as one — the month start, the fifteenth, and 望 — using 2026's actual new and full moon times, then explains why none of it moves a BaZi month pillar, which turns at solar terms instead.",[15,21,63,70,76,82,90],{"heading":16,"body":17},"初一 is a day that contains an instant",[18,19,20],"A Chinese lunar month begins on 初一, and that date is not a choice. It is the calendar day — counted in China Standard Time, UTC+8 — that contains the new moon: the moment the moon and sun share the same ecliptic longitude, which the almanac calls 朔.","Because 朔 is an instant and a calendar counts whole days, 初一 can begin at any hour. On 10 October 2026 the new moon falls at 23:50 CST, so 初一 is 10 October and 初二 starts ten minutes later. The next new moon is at 15:02 on 9 November, so 十月初一 is 9 November. One rule, two very different times of day.","One practical consequence: 初一 is not the evening the first crescent appears. At conjunction the moon sits in the sun's glare, and the crescent usually shows up a day or two later, depending on latitude, haze and how high the moon climbs after sunset.",{"heading":22,"body":23,"table":26},"Why a lunar month has 29 or 30 days and never 29.5",[24,25],"The average interval from one new moon to the next is 29.5306 days — the synodic month. A calendar counts whole days, so a lunar month is either 29 days (小月) or 30 (大月). Nothing in between is possible.","The actual intervals in 2026 run from 29.28 to 29.67 days, which is why the 29\u002F30 sequence looks irregular: it is irregular. Across the eleven months that begin in 2026 the lengths read 30, 29, 30, 29, 29, 30, 29, 29, 30, 30, 30 — three 30-day months in a row from October to December. You cannot predict the next month's length by alternating, and no short cycle will do it either; only the ephemeris decides.",{"headers":27,"rows":33},[28,29,30,31,32],"Month (2026)","初一","Length","Full moon (CST)","Day of month",[34,40,45,50,54,59],[35,36,37,38,39],"四月","17 May","29 days","31 May, 16:46","十五",[41,42,37,43,44],"五月","15 June","30 June, 07:57","十六",[46,47,48,49,44],"六月","14 July","30 days","29 July, 22:36",[51,52,37,53,44],"七月","13 August","28 August, 12:18",[55,56,37,57,58],"八月","11 September","27 September, 00:49","十七",[60,61,48,62,58],"九月","10 October","26 October, 12:11",{"heading":64,"body":65},"The full moon is a second instant, and it drifts",[66,67,68,69],"望, the full moon, is opposition: the moon stands 180° from the sun. If the two events were evenly spaced, 望 would fall half a synodic month after 朔 — 14.77 days — putting it late on 十五 or early on 十六 almost every month.","They are not evenly spaced. The moon's orbital speed varies: faster near perigee, slower near apogee, with a further monthly wobble added by the sun's pull. In 2026 the gap from 朔 to 望 ranges from 13.98 days in February to 15.56 days in September.","Two numbers then decide the date written in the almanac: the length of that particular gap, and the clock time of 朔. A 15.56-day gap that starts at 23:50 puts the full moon two days after 十五. Across the eleven lunar months beginning in 2026, 望 lands on 十五 three times, on 十六 six times and on 十七 twice.","That is the mechanism behind 十五的月亮十六圆 — \"the moon of the fifteenth is round on the sixteenth\". The saying is not a complaint about the calendar. It is an accurate description of a calendar counting days from 初一 while the sky counts from the conjunction.",{"heading":71,"body":72},"A 2026 case: Mid-Autumn on the 15th, full moon on the 17th",[73,74,75],"八月十五 2026, the Mid-Autumn Festival, falls on Friday 25 September. The new moon that opened that month came at 11:27 on 11 September. The full moon arrives at 00:49 on 27 September, which is 八月十七 — two days after the festival. The day pillar on the festival is 壬寅; on the actual full moon it is 甲辰.","九月 shows the same effect from a different cause. Its 初一 is 10 October, because the new moon fell at 23:50 that night. The full moon comes at 12:11 on 26 October, so 望 is 九月十七. Had that new moon been sixteen hours earlier, the whole month would have shifted back a day and 望 would have read 十六.","Neither date is wrong. The festival is a fixed calendar date; the full moon is an astronomical event. When someone insists the moon \"should\" be full on the fifteenth, they are treating the two as one thing.",{"heading":77,"body":78},"What this changes in a BaZi chart: nothing",[79,80,81],"The month pillar does not follow 初一, and it does not follow the moon. It changes at the twelve 节 — 立春, 惊蛰, 清明, 立夏, 芒种, 小暑, 立秋, 白露, 寒露, 立冬, 大雪, 小寒 — which are 15° divisions of the sun's longitude. The other twelve terms, the 中气, do not open a month at all.","So 八月十五 and 八月十七 2026 both sit inside the 丁酉 month that began at 白露 on 7 September. The month turns to 戊戌 at 寒露 on 8 October and to 己亥 at 立冬 on 7 November. None of those switches is tied to a new moon or a full moon.","There is no moon column either. A Four Pillars chart has four — year, month, day, hour — and each is a stem-branch pair. 初一 and 十五 cannot appear in it, and \"born on a full moon\" is not a category a chart can read. The almanac's 宜 and 忌 entries are keyed to the day's stem-branch inside the solar month, not to the phase.",{"heading":83,"body":84,"bullets":85},"Checking a date yourself, in four steps","The method needs nothing beyond an ephemeris that lists new and full moons in UTC. Times here are converted to UTC+8, because that is the meridian the Chinese calendar uses.",[86,87,88,89],"Find the new-moon instant in UTC and add eight hours. The resulting date is 初一 for that month.","Find the next full-moon instant and convert it the same way. That date is 望, whatever day number the almanac gives it.","Count the days between the two dates and add one. That is the lunar day of the full moon — 15, 16 or 17 in nearly every month.","Check the month pillar separately, against the solar terms rather than against 初一, and if two sources disagree by a day, compare their UTC offsets before doubting either one.",{"heading":91,"body":92},"Three things that are close together, not the same thing","初一, 十五 and 望 are separate events that happen to fall within a day or two of each other most months. The month start is arithmetic on an instant; the fifteenth is a count of days; the full moon is astronomy. Knowing which is which is the difference between reading a date and guessing at one — and it is the difference between a check anyone can repeat and a claim nobody can.",[94,101,108],{"id":95,"kind":96,"title":97,"detail":98,"publisher":99,"url":100,"accessedAt":11},"nasaMoonPhases","practical","NASA Science: Moon Phases","Used for the definition of a phase as the moon's position relative to the sun and Earth, and for the 29.5-day synodic month. It describes the astronomy; it says nothing about calendars or fortune.","NASA Science","https:\u002F\u002Fscience.nasa.gov\u002Fmoon\u002Fmoon-phases\u002F",{"id":102,"kind":96,"title":103,"detail":104,"publisher":105,"url":106,"accessedAt":107},"ianaTimeZones","IANA Time Zone Database (tzdata)","The reference dataset for historical UTC offsets and daylight-saving transitions. Its Asia\u002FShanghai rules are the source for the 1986–1991 China summer-time dates used in this article.","Internet Assigned Numbers Authority","https:\u002F\u002Fiana.org\u002Ftime-zones","2026-10-16",{"id":109,"kind":110,"title":111,"detail":112,"publisher":113,"url":114,"accessedAt":115},"yuanhaiZiping","traditional","Yuanhai Ziping (渊海子平)","A classical source for Four Pillars terminology, element relationships, and the Day Master framework.","Wikisource digital text","https:\u002F\u002Fzh.wikisource.org\u002Fwiki\u002F%E6%B7%B5%E6%B5%B7%E5%AD%90%E5%B9%B3","2026-07-14",[117],"bazi-four-pillars",{"title":119,"description":120,"path":121,"type":122},"Why the Full Moon Is Often on the 16th, Not the 15th","A lunar month starts on 初一, the day containing the new moon. In 2026 the full moon falls on 十五 three times, 十六 six times and 十七 twice. Here is why.","\u002Farticles\u002Fnew-moon-full-moon-lunar-month","article",{"topic":124,"articles":165,"tools":226},{"slug":8,"title":125,"eyebrow":126,"description":127,"relatedTools":128,"articleIdeas":132,"seo":136,"sections":140},"BaZi and Four Pillars","Chinese astrology","A method-first guide to Four Pillars calculation, five-element terminology, interpretive disagreement, input uncertainty, and responsible use.",[117,129,130,131],"bazi-marriage","bazi-career-wealth","bazi-bone-weight",[133,134,135],"BaZi Five Elements Lookup","Is BaZi Fortune Telling Accurate?","How BaZi Is Used in Feng Shui Planning",{"title":137,"description":138,"path":139},"BaZi and Four Pillars Guide","Learn how to check a Four Pillars chart, compare interpretation methods, preserve input uncertainty, and avoid unsupported personal claims.","\u002Ftopics\u002Fbazi",[141,144,147,150,153,156,159,162],{"heading":142,"body":143},"Separate chart calculation from interpretation","A BaZi tool converts birth details into year, month, day, and hour stem-branch pairs. Five Elements, Day Master, hidden stems, strength, useful-element, relationship, and timing language belong to later traditional interpretation. This hub keeps the checkable chart separate from claims about a person.",{"heading":145,"body":146},"Follow a practical reading path","Start with the Five Elements guide, then read how calendar boundaries affect a chart before opening a calculator. Use the Four Pillars tool to keep the chart details, the relationship worksheet to understand the stated comparison rules, and the work tool only for low-risk reflection. Do not jump from one label to a consequential decision.",{"heading":148,"body":149},"Define the evidence boundary before reading","A calculation can be checked against the same calendar and boundary rules. That does not validate a personality, health, compatibility, income, or event claim. Record the named method, uncertainty, supporting evidence, contrary evidence, and the real-world source that will govern any important choice.",{"heading":151,"body":152},"How to check a calculation before interpreting it","Record the original birth date, local time, place, time zone, and whether the time is exact or approximate. Then verify which calendar and solar-term convention the calculator uses. A changed month or hour pillar may come from a boundary rule rather than a broken chart. Keep this calculation record beside the reading so that another result can be compared on the same assumptions instead of comparing two unexplained scores.",{"heading":154,"body":155},"A useful reading workflow","Begin with the Day Master and the overall five-element distribution, then examine stems, branches, hidden stems, and relationship patterns together. Write down one interpretation that seems relevant and one piece of real evidence that supports or challenges it. End with a small action or question you can review later. This makes the reading a structured reflection exercise rather than a verdict about personality, health, wealth, marriage, or future events. When calculators disagree, compare their calendar boundaries and input assumptions before deciding that either interpretation is meaningful. Keep uncertainty visible in the final notes, especially when birth time is approximate, and avoid selecting only the interpretation that confirms an existing fear or preference.",{"heading":157,"body":158},"A complete BaZi decision path","Begin by preserving the calculation record: Gregorian or lunar date, birthplace, time zone, daylight-saving treatment, solar-term boundary, and whether true solar time is corrected. Next, inspect the four pillars and element distribution before reading interpretations. Compare at least two explanations when schools use different strength or useful-element methods. Translate one broad theme into an observable question, such as a work habit or communication pattern, and set a review date. Keep evidence that disagrees with the reading as well as evidence that appears to fit. Use the chart for cultural study and structured reflection, not as proof of health, personality, compatibility, wealth, or a future event. When time is unknown or close to a calendar boundary, reduce detail and show the uncertainty instead of filling a default hour. The related articles explain the element model, test claims of accuracy, and show how personal symbolism can be used cautiously alongside a real environment; the tools should be opened only after these assumptions are understood.",{"heading":160,"body":161},"How to compare two BaZi results","Place both charts side by side before comparing interpretations. Check the entered calendar, local time, birthplace, time zone, daylight-saving rule, solar-term boundary, day-change convention, and true-solar-time choice. Mark every pillar that differs and identify which later conclusion depends on that difference. If the charts match but the readings do not, compare the stated strength, structure, and useful-element method instead of averaging the conclusions. Preserve uncertainty in your notes and test only low-risk, observable prompts. A result that feels personally accurate is not proof that the method predicts events; confirmation bias and broad language can make many statements feel specific. Use consistent birth details and clearly stated methods so the comparison remains educational rather than authoritative. Keep the date of each result because a later correction to the calendar method can change it. When a conclusion could influence a consequential choice, pause and gather evidence from the relevant real-world domain before acting.",{"heading":163,"body":164},"Before accepting a chart conclusion","Confirm that the saved input and calendar assumptions reproduce the same four pillars. Identify the named interpretation method and the exact chart feature supporting each conclusion. Ask what alternative explanation another school might offer, what information is missing, and what real-world evidence disagrees. Reduce confidence near solar-term, day, and hour boundaries. For any consequential topic, gather evidence from the actual domain and consult an appropriate professional. The chart may organize questions, but it cannot establish diagnosis, compatibility, worth, income, or a future event. Record one low-risk action and one review date rather than applying every interpretation at once.",[166,176,185,194,204,213,223],{"slug":167,"title":133,"description":168,"category":7,"topicSlug":8,"legacyPath":169,"authorId":10,"publishedAt":170,"updatedAt":115,"summary":171,"relatedTools":172,"seo":173},"bazi-five-elements-lookup","A practical introduction to the five elements in BaZi and how Wood, Fire, Earth, Metal, and Water are used in birth profile interpretation.","\u002Fpages\u002Farticles\u002Fbazi-wuxing-chaxun.html","2025-09-01","The five elements are one of the easiest ways to begin reading BaZi. Learn what each element represents and why balance matters more than a simple good-or-bad label.",[129,117],{"title":133,"description":174,"path":175,"type":122},"Learn how the five elements are used in BaZi birth profile interpretation and relationship compatibility reports.","\u002Farticles\u002Fbazi-five-elements-lookup",{"slug":177,"title":134,"description":178,"category":7,"topicSlug":8,"legacyPath":179,"authorId":10,"publishedAt":180,"updatedAt":115,"summary":181,"relatedTools":182,"seo":183},"is-bazi-fortune-telling-accurate","Examine how birth-data quality, chart rules, school differences, and the Barnum effect shape the perceived accuracy of a BaZi reading.","\u002Fpages\u002Farticles\u002Fbazi-suanming-zhun-ma.html","2025-09-21","This guide separates chart calculation from interpretation, compares two conflicting readings, and sets firm boundaries for health, finance, law, and relationship decisions.",[117],{"title":134,"description":178,"path":184},"\u002Farticles\u002Fis-bazi-fortune-telling-accurate",{"slug":186,"title":135,"description":187,"category":7,"topicSlug":8,"legacyPath":188,"authorId":10,"publishedAt":189,"updatedAt":115,"summary":190,"relatedTools":191,"seo":192},"bazi-impact-on-feng-shui","Learn how practitioners compare a BaZi five-element profile with room function, color, materials, and direction without replacing practical design.","\u002Fpages\u002Farticles\u002F八字命理如何影响风水布局-mh6guthf4bbl.html","2025-11-30","BaZi and feng shui share five-element vocabulary but answer different questions. This guide keeps personal symbolism secondary to comfort, safety, climate, and function.",[117],{"title":135,"description":187,"path":193},"\u002Farticles\u002Fbazi-impact-on-feng-shui",{"slug":195,"title":196,"description":197,"category":7,"topicSlug":8,"legacyPath":9,"authorId":10,"publishedAt":198,"updatedAt":198,"summary":199,"relatedTools":200,"seo":201},"double-ninth-festival-chinese-calendar","Double Ninth Festival: Reading the Ninth Day of the Ninth Month","The Double Ninth Festival falls on the ninth day of the ninth lunar month, which is 18 October in 2026. This guide shows how that date is calculated from the solar terms, why the number nine is called yang, and which parts of an almanac entry for the day are arithmetic and which are the tradition's own labels.","2026-10-14","The ninth day of the ninth month is fixed in the lunisolar calendar and floats in the Gregorian one, so it moves by up to three weeks each year. This article separates the checkable part of the date, including the solar-term month boundary and the day pillar, from the symbolic part, and explains why a broad reading of any single day can feel personally accurate.",[117],{"title":196,"description":202,"path":203},"How the ninth day of the ninth lunar month is calculated from the solar terms, what double yang means, and how to read an almanac entry for the day without overclaiming.","\u002Farticles\u002Fdouble-ninth-festival-chinese-calendar",{"slug":205,"title":206,"description":207,"category":7,"topicSlug":8,"legacyPath":9,"authorId":10,"publishedAt":107,"updatedAt":107,"summary":208,"relatedTools":209,"seo":210},"frost-descent-solar-term-bazi-month","Frost's Descent 2026: The Solar Term That Does Not Move Your BaZi Month","Frost's Descent (霜降) falls on Friday 23 October in 2026. It is one of the twelve 中气, not one of the twelve 节 that open a solar month, so the BaZi month pillar is unchanged from Cold Dew on 8 October until Winter Begins on 7 November. This article runs the date through the almanac and separates what can be reproduced from what the tradition attaches to the day.","The twenty-four solar terms alternate between twelve 节 that open a solar month and twelve 中气 that sit in the middle of one. Frost's Descent is a 中气, which is why any tool that moves the BaZi month at every term will disagree with a traditional almanac for most of late October. The article gives the date, the pillars, and a checklist for using it without overclaiming.",[117],{"title":206,"description":211,"path":212},"Frost's Descent 2026 falls on 23 October. It is a 中气, so it does not open a new BaZi month: the month pillar stays 戊戌 until Winter Begins on 7 November.","\u002Farticles\u002Ffrost-descent-solar-term-bazi-month",{"slug":214,"title":215,"description":216,"category":7,"topicSlug":8,"legacyPath":9,"authorId":10,"publishedAt":107,"updatedAt":107,"summary":217,"relatedTools":218,"seo":219},"bazi-birth-time-corrections","Four Time Corrections That Change Your BaZi Chart","A birth record gives a date, a clock reading and a place. Four corrections sit between that record and a usable chart input: the UTC offset in force on the date, China's 1986–1991 summer time, true solar time, and the two 子时 day-boundary conventions. Each one is arithmetic you can write down and reproduce.","Most disagreements about a computed Four Pillars chart come from the input rather than the interpretation. This article works through the four conversions that decide which hour branch, and sometimes which day pillar, a birth record produces. It includes a worked summer-time example and a check order you can repeat on any chart.",[117],{"title":220,"description":221,"path":222,"type":122},"BaZi Birth Time Corrections: Zone, Summer Time, True Solar Time","Four corrections between a birth record and a Four Pillars chart input: the UTC offset on the date, China's 1986–1991 summer time, true solar time, and the 子时 day boundary.","\u002Farticles\u002Fbazi-birth-time-corrections",{"slug":4,"title":5,"description":6,"category":7,"topicSlug":8,"legacyPath":9,"authorId":10,"publishedAt":11,"updatedAt":11,"summary":13,"relatedTools":224,"seo":225},[117],{"title":119,"description":120,"path":121,"type":122},[227,232,236,240],{"slug":117,"title":228,"shortTitle":229,"description":230,"category":7,"status":231},"Four Pillars BaZi Calculator","Four Pillars","Enter a Gregorian birth date and local time to see the four pillars, hidden stems, Ten Gods, Na Yin, branch relations, and element counts, with clear calendar and time-boundary limits.","live",{"slug":129,"title":233,"shortTitle":234,"description":235,"category":7,"status":231},"BaZi Relationship Comparison Worksheet","Relationship Comparison","Compare two anonymous birth profiles with the traditional rules explained on this page, then turn the result into questions about communication, expectations, boundaries, and uncertainty rather than predicting relationship outcomes.",{"slug":130,"title":237,"shortTitle":238,"description":239,"category":7,"status":231},"BaZi Work and Resource Reflection Tool","Work Reflection","View a Four Pillars chart and element counts, compare broad cultural work associations with real evidence, and define a reversible 30-day test without aptitude, income, or timing scores.",{"slug":131,"title":241,"shortTitle":242,"description":243,"category":7,"status":231},"Bone Weight Song Calculator and Source Text","Bone Weight Song","Reproduce the folk Bone Weight Song lookup from four visible table values, inspect the converted lunar fields, and read the matched historical verse with explicit limits instead of treating it as a life forecast.",{"articles":245},[246,249,264],{"slug":167,"title":133,"description":168,"category":7,"topicSlug":8,"legacyPath":169,"authorId":10,"publishedAt":170,"updatedAt":115,"summary":171,"relatedTools":247,"seo":248},[129,117],{"title":133,"description":174,"path":175,"type":122},{"slug":250,"title":251,"description":252,"category":253,"topicSlug":254,"legacyPath":255,"authorId":256,"publishedAt":257,"updatedAt":258,"summary":259,"relatedTools":260,"seo":262},"moving-day-auspicious-date","Auspicious Moving Day Selection","A practical guide to choosing an auspicious moving day with traditional date selection and modern moving logistics.","Date Selection","feng-shui-cures","\u002Fpages\u002Farticles\u002Fbanjia-ze-jiri.html","zhang-hao","2025-09-19","2026-10-15","Moving day selection works best when traditional timing supports real preparation, safety, cleaning, utilities, and a calm first entry.",[117,261],"qi-men-dun-jia",{"title":251,"description":252,"path":263},"\u002Farticles\u002Fmoving-day-auspicious-date",{"slug":177,"title":134,"description":178,"category":7,"topicSlug":8,"legacyPath":179,"authorId":10,"publishedAt":180,"updatedAt":115,"summary":181,"relatedTools":265,"seo":266},[117],{"title":134,"description":178,"path":184},1792206144655]