TODAY
Today's sky and
the traditional calendars
Several traditions each give today a name of their own, and in the sky the Moon and Sun move on. This page only calculates and shows that by the rules; it does not judge which days are good or bad. It asks for no birth details.
Today
Moon and Sun
The lunar phase angle is the difference in ecliptic longitude between the Sun and the Moon: 0° is new moon, 180° is full moon. These rows are computed on the spot, so they carry no year limit.
Names the traditions give today
These are the names that tradition gives to the day; they are not marks of good or bad. Rows that depend on lunar-calendar and solar-term data are left blank from the year that data ends.
The twelve earthly branches and animals
| Animal | Branch | Today | Next day of that animal |
|---|
The twelve branches advance one place a day and come round every twelve days. We only note when each animal's day falls; we do not work out whether that day is good or bad for it.
See more
To go further with birth details, visit the pages below.
Korean Saju · Four pillars · Today's sky · Planet comparison · Traditional date calendar · Japanese stars and feng shui numbers
What rules were used?
Today's sexagenary day
The day's sexagenary name is a sixty-day cycle in which the ten stems and twelve branches run on without a break. This page counts it straight from the Julian day number. For 1960 through 2026 it was compared day by day against the four-pillar calculation that was checked against Korea Astronomy and Space Science Institute data, and all 24,472 days matched; later years continue the same cycle.
Comparison record: 06_Reports/Today_Cycles_2026-11-03.json
Moon and Sun
The lunar phase, the lit fraction and the Sun's ecliptic longitude are all computed on the spot with Astronomy Engine. The sign the Sun stands in follows the tropical zodiac, which begins at the vernal point and divides the ecliptic every 30°. The boundaries were checked at the four moments of the equinoxes and solstices.
六曜
These are the six names of the Japanese calendar, fixed by the lunar month and day. The National Diet Library's account notes that the names and their order only settled in the late Edo period and that there is no standard for which is correct. Here they are calculated from Korean lunar dates.
十二直
The day whose branch matches the branch of the solar-term month is set as 建, and the names advance one place each day. On a day a solar term begins, the previous day's name is used once more. This is the rule given in the National Astronomical Observatory's account, and the solar-term dates come from Korea Astronomy and Space Science Institute data.
Spirit-free day
A day on which the wandering spirits are said not to roam: a lunar date ending in 9 or 0. The National Folk Museum's Encyclopedia of Korean Folk Culture records it so.
Encyclopedia of Korean Folk Culture: Spirit-free days ↗
Javanese weton
A seven-day week and a five-day market cycle turn together and come round every thirty-five days. Indonesian public records fix 2 September 2022 as Jumat and Legi, and this page counts on from that day. For 1960 through 2026 it was compared day by day with the weton calculation and every day matched.
What was and was not verified
- The cycle counts were compared day by day from 1960 through 2026 and nothing disagreed. Outside that span the values continue the same cycle and have not been compared against outside sources.
- The lunar-calendar and solar-term data have an end, so 六曜, 十二直 and the spirit-free day are left blank beyond it. They are never filled in with another day's values.
- Rules that read the relation between animals or signs as good or bad are not included, because no source for them was obtained. This page therefore does not say what kind of day it is for a given animal.
- This page uses the date on your device. In a different time zone it may be a day off.