Banshoreki main entrance ＞ Observatory ＞ Japanese calendar

Japanese calendar

For a chosen year and month: the 24 solar terms, new moons and lunisolar months, daily stem-branch, rokuyo, lunar mansion, nine-star day chart, and the year and month pillars. A perpetual calendar replacement.

Same code as the Banshoreki reading. Solar terms and new moons are in JST; see calendar verification. There is no official lunisolar calendar after 1873. This site prioritizes month 11 containing the winter solstice, using new moons and mid-terms. It adopts leap month 11 for 2033 (NAOJ option 1 for the 2033 problem). Sukuyō and other lunisolar-based results follow this convention.

Year

Month

Show

Sun for the solar terms from the JPL Horizons tables (1900–2100); new moons from Meeus ch. 49; ΔT from Espenak & Meeus; daily stem-branch from the Julian Day number modulo 60 (2000-01-01 = 戊午). CSV is UTF-8 with BOM (Japanese column names). Everything stays on your device.