Japanese calendar for October 2027

Last updated: Oct 9, 2026 13:42 UTC

Date	Day	Old calendar	Rokuyō	Day sign	Solar terms and seasonal days
10/1/27	Fri	9/2	Butsumetsu	癸丑
10/2/27	Sat	9/3	Taian	甲寅
10/3/27	Sun	9/4	Shakkō	乙卯
10/4/27	Mon	9/5	Senshō	丙辰
10/5/27	Tue	9/6	Tomobiki	丁巳
10/6/27	Wed	9/7	Senbu	戊午
10/7/27	Thu	9/8	Butsumetsu	己未
10/8/27	Fri	9/9	Taian	庚申	Kanro (Cold dew) 21:17
10/9/27	Sat	9/10	Shakkō	辛酉
10/10/27	Sun	9/11	Senshō	壬戌
10/11/27	Mon	9/12	Tomobiki	癸亥
10/12/27	Tue	9/13	Senbu	甲子
10/13/27	Wed	9/14	Butsumetsu	乙丑
10/14/27	Thu	9/15	Taian	丙寅
10/15/27	Fri	9/16	Shakkō	丁卯
10/16/27	Sat	9/17	Senshō	戊辰
10/17/27	Sun	9/18	Tomobiki	己巳
10/18/27	Mon	9/19	Senbu	庚午
10/19/27	Tue	9/20	Butsumetsu	辛未
10/20/27	Wed	9/21	Taian	壬申
10/21/27	Thu	9/22	Shakkō	癸酉	Start of doyō 00:10
10/22/27	Fri	9/23	Senshō	甲戌
10/23/27	Sat	9/24	Tomobiki	乙亥
10/24/27	Sun	9/25	Senbu	丙子	Sōkō (Frost’s descent) 00:33
10/25/27	Mon	9/26	Butsumetsu	丁丑
10/26/27	Tue	9/27	Taian	戊寅
10/27/27	Wed	9/28	Shakkō	己卯
10/28/27	Thu	9/29	Senshō	庚辰
10/29/27	Fri	10/1	Butsumetsu	辛巳
10/30/27	Sat	10/2	Taian	壬午
10/31/27	Sun	10/3	Shakkō	癸未

← September 2027 · November 2027 →

Method

Solar terms are the moments the Sun’s apparent ecliptic longitude reaches multiples of 15°, computed with Skyfield and the JPL DE421 ephemeris and given in Japan Standard Time. Old-calendar months begin on the JST date of each new moon; the month containing the winter solstice is month 11, and in a year with 13 months the first month without a principal term is the leap month. Rokuyō follow (month + day) of the old calendar; day signs follow the 60-day cycle. Seasonal days use the conventional definitions (e.g. setsubun = the day before risshun, hachijū-hachiya = the 88th day counting risshun as day 1). Dates were cross-checked against the National Astronomical Observatory of Japan’s published calendar.

About this page

Old calendar, rokuyō and solar terms for each day of October 2027 (Japan time).

Rokuyō are a traditional calendar notation still printed on Japanese calendars. They have no scientific basis; this site lists them only as a calendar convention.