Lunar and solar together
Each date keeps its Gregorian day, lunar month and day, leap-month status, solar term, festival and year, month and day GanZhi in one view.
YIMATRIX · ONLINE TOOL
Perpetual Calendar
Explore lunar dates, Ganzhi cycles, solar terms, daily do-and-avoid guidance, clashes, Nayin and hourly fortune, then find dates suited to your activity.
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Chinese Calendar · Huangli · Date Selection
Move from a month view to the reasons behind a selected day
The YiMatrix calendar calculates lunar dates, leap months, solar terms and GanZhi locally in the browser. Select a day to inspect its Yi and Ji activities, clashes, Nayin, Pengzu taboos, auspicious and inauspicious spirits, mansions and two-hour periods. The date-selection workspace then filters a chosen range for one concrete activity.
A day with context
Yi and Ji are displayed beside clash, Nayin, Day Officer, mansion, Pengzu taboos, spirits and the luck of each traditional two-hour period.
Activity-based search
Choose one activity, a date range and an optional weekend filter. Matching dates and saved favourites remain in the current browser.
Calculation method
Calendar conversion and filtering happen on the device
The Gregorian date is converted into the Chinese lunar calendar and GanZhi system with local calculation. Date selection checks the selected activity against the Yi or Ji list for every day in the requested range. It is a traditional almanac reference, not a guarantee of an outcome, and it does not require AI or an account.
Chinese calendar questions
Does the calendar include leap lunar months?
Yes. Leap-month status belongs to the calculated lunar date and is shown explicitly instead of being treated as an ordinary month.
How does auspicious-date search work?
Select whether the activity should appear under Yi or Ji, choose the activity and set a date range. YiMatrix checks each date with the same local almanac dataset used by the calendar view.
Are saved dates uploaded to an account?
No. Calendar searches and saved dates are stored only in the current browser. Clearing browser storage removes them, and they do not become account records.