How Renovation Date Screening Works in 2026
A renovation is an “earth-disturbing” act. Classical date selection does not treat every day as equally suitable, and it does not treat every direction as equally safe. This tool runs the headline checks that a homeowner can act on before booking a contractor, using the 2026 (Bing Wu) year cycle as its reference.
Layer 1 — The year’s sensitive sectors: Tai Sui and Three Killings
In 2026 the Tai Sui (Jupiter) position is the South, the Sui Po directly opposite it is the North, and the Three Killings (San Sha) fall in the North. Classical practice treats these as “quiet” sectors: drilling, demolition, or structural change in them is what the almanac warns against. If your renovation is in one of these sectors, the tool will flag it regardless of how clean the calendar date looks.
Layer 2 — Year-break and month-break days
A year-break day (Sui Po day) is a day whose earthly branch opposes the year’s Tai Sui branch. In 2026 the year branch is Wu, so days carrying the opposing branch are year-break days. A month-break day works the same way at the monthly scale: the day branch opposes the current month branch. Both are treated as unsuitable for major earth-moving work. The tool calculates these from the date you enter, not from a static list.
Layer 3 — The four seasonal transition days
Traditional almanacs mark eight hinge points each year. The Four Cut-off days (Si Jue) are the day before Li Chun, Li Xia, Li Qiu and Li Dong — the season is about to end. The Four Separation days (Si Li) are the day before the spring equinox, summer solstice, autumn equinox and winter solstice — the qi is splitting. Renovation, moving and major commitments are conventionally avoided on these eight days. The tool approximates their dates from the year and flags them automatically.
Layer 4 — Personal clash screen
The almanac does not know who lives in the house. A day can be clean on the calendar and still clash with an occupant’s personal chart. This tool runs a basic personal screen: it derives your Kua number from your birth year and gender, and checks whether the day’s branch conflicts with that Kua or with your birth-year branch. This is not a substitute for a full Four Pillars date selection, but it catches the most common personal conflicts that a generic almanac misses.
How to read the verdict
Proceed means no headline conflict was found at the sector or day level. Caution means one minor flag — for example, a month-break day but a safe sector — where light work may be acceptable but structural changes should wait. Avoid means at least one major conflict: the work falls in the Tai Sui, Sui Po or Three Killings sector, or the date is a year-break day, or the personal screen produced a direct clash. The verdict is deliberately conservative: it is easier to move a date than to undo a renovation started on an unsuitable day.