①Bazi — the Four Pillars of Destiny
八字 · 四柱
Bazi, literally “eight characters”, writes the moment of birth as four pillars – year, month, day and hour – each made of one Heavenly Stem and one Earthly Branch. Those eight characters are mapped onto the five elements of wood, fire, earth, metal and water, and read through relationships such as the Ten Gods, the hidden stems inside each branch and the ten-year luck pillars.
Our Bazi calculator converts your birth date and time with the 24 solar terms, so the month pillar changes at the solar term rather than on the first day of a calendar month, and it can apply true solar time for your birthplace. The result shows the four pillars, the element balance, the strength of the day master, favourable elements, luck pillars, symbolic stars (shensha) and the traditional “bone weight” score.
②Zi Wei Dou Shu — Purple Star Astrology
紫微斗數
Zi Wei Dou Shu arranges a chart into twelve palaces: Life, Siblings, Spouse, Children, Wealth, Health, Travel, Friends, Career, Property, Fortune and Parents. Fourteen major stars, led by the Purple Star (Zi Wei), are placed in those palaces from the lunar birth date and the hour branch, together with the four transformations (四化) of the birth year.
Where Bazi weighs the balance of elements, Zi Wei Dou Shu asks which area of life each star sits in. The calculator draws the twelve-palace grid, marks the Life and Body palaces, and lists the major stars and the transformations. Because the palaces depend on the birth hour, this tool needs a birth time.
③Saju — the Korean Four Pillars
사주 · 만세력
Saju (사주, 四柱) is the Korean name for the same four-pillar system, and a manseryeok (만세력) is the perpetual calendar used to look the pillars up. Korean practice usually corrects the birth hour to true solar time, because Korea Standard Time runs about thirty minutes ahead of the sun at Seoul; the Korean tool turns this correction on by default and shows the adjusted time.
Alongside the chart you will find the element distribution, strength, the useful god, major and annual luck, and symbolic stars such as 귀인 (noble helpers) and 공망 (void). The Saju compatibility tool (사주궁합) compares two charts through their day pillars and complementary elements, and gives a reference score with an itemised breakdown.
Tarot is not part of the Chinese calendar tradition, but many people use it next to a chart as a prompt for reflection. Ganjiday offers a three-card spread for past, present and future, a card of the day, a yes-or-no draw and the Celtic Cross.
Every one of the 78 cards of the Rider–Waite–Smith deck has its own meaning page in Traditional Chinese, Simplified Chinese and Korean, with upright and reversed readings. Cards are shuffled and drawn in your browser.