Sōkō (Frost’s descent): dates and times 1951–2050

How often each date occurs

Oct 2365

Oct 2435

Year	Date	Day	Time (JST)
1951	Oct 24	Wed	14:36
1952	Oct 23	Thu	20:22
1953	Oct 24	Sat	02:06
1954	Oct 24	Sun	07:56
1955	Oct 24	Mon	13:43
1956	Oct 23	Tue	19:34
1957	Oct 24	Thu	01:24
1958	Oct 24	Fri	07:11
1959	Oct 24	Sat	13:11
1960	Oct 23	Sun	19:02
1961	Oct 24	Tue	00:47
1962	Oct 24	Wed	06:40
1963	Oct 24	Thu	12:29
1964	Oct 23	Fri	18:21
1965	Oct 24	Sun	00:10
1966	Oct 24	Mon	05:51
1967	Oct 24	Tue	11:44
1968	Oct 23	Wed	17:30
1969	Oct 23	Thu	23:11
1970	Oct 24	Sat	05:04
1971	Oct 24	Sun	10:53
1972	Oct 23	Mon	16:41
1973	Oct 23	Tue	22:30
1974	Oct 24	Thu	04:11
1975	Oct 24	Fri	10:06
1976	Oct 23	Sat	15:58
1977	Oct 23	Sun	21:41
1978	Oct 24	Tue	03:37
1979	Oct 24	Wed	09:28
1980	Oct 23	Thu	15:18
1981	Oct 23	Fri	21:13
1982	Oct 24	Sun	02:58
1983	Oct 24	Mon	08:54
1984	Oct 23	Tue	14:46
1985	Oct 23	Wed	20:22
1986	Oct 24	Fri	02:14
1987	Oct 24	Sat	08:01
1988	Oct 23	Sun	13:44
1989	Oct 23	Mon	19:35
1990	Oct 24	Wed	01:14
1991	Oct 24	Thu	07:05
1992	Oct 23	Fri	12:57
1993	Oct 23	Sat	18:37
1994	Oct 24	Mon	00:36
1995	Oct 24	Tue	06:32
1996	Oct 23	Wed	12:19
1997	Oct 23	Thu	18:15
1998	Oct 23	Fri	23:59
1999	Oct 24	Sun	05:52
2000	Oct 23	Mon	11:47
2001	Oct 23	Tue	17:26
2002	Oct 23	Wed	23:18
2003	Oct 24	Fri	05:08
2004	Oct 23	Sat	10:49
2005	Oct 23	Sun	16:42
2006	Oct 23	Mon	22:26
2007	Oct 24	Wed	04:15
2008	Oct 23	Thu	10:09
2009	Oct 23	Fri	15:43
2010	Oct 23	Sat	21:35
2011	Oct 24	Mon	03:30
2012	Oct 23	Tue	09:14
2013	Oct 23	Wed	15:10
2014	Oct 23	Thu	20:57
2015	Oct 24	Sat	02:47
2016	Oct 23	Sun	08:46
2017	Oct 23	Mon	14:27
2018	Oct 23	Tue	20:22
2019	Oct 24	Thu	02:20
2020	Oct 23	Fri	08:00
2021	Oct 23	Sat	13:51
2022	Oct 23	Sun	19:36
2023	Oct 24	Tue	01:21
2024	Oct 23	Wed	07:15
2025	Oct 23	Thu	12:51
2026	Oct 23	Fri	18:38
2027	Oct 24	Sun	00:33
2028	Oct 23	Mon	06:13
2029	Oct 23	Tue	12:08
2030	Oct 23	Wed	18:01
2031	Oct 23	Thu	23:49
2032	Oct 23	Sat	05:46
2033	Oct 23	Sun	11:28
2034	Oct 23	Mon	17:16
2035	Oct 23	Tue	23:16
2036	Oct 23	Thu	04:59
2037	Oct 23	Fri	10:50
2038	Oct 23	Sat	16:41
2039	Oct 23	Sun	22:25
2040	Oct 23	Tue	04:20
2041	Oct 23	Wed	10:02
2042	Oct 23	Thu	15:50
2043	Oct 23	Fri	21:47
2044	Oct 23	Sun	03:26
2045	Oct 23	Mon	09:13
2046	Oct 23	Tue	15:04
2047	Oct 23	Wed	20:49
2048	Oct 23	Fri	02:43
2049	Oct 23	Sat	08:25
2050	Oct 23	Sun	14:12

Computed from the JPL DE421 ephemeris with Skyfield, in Japan Standard Time. The lunisolar dates follow the traditional Tenpō rules for reference only (the leap month around 2033 is disputed). Rokuyō and the sexagenary cycle are calendar customs, not predictions.

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Sōkō (Frost’s descent) (solar longitude 210°): earliest in 2048 (Oct 23 02:43 JST), latest in 1951 (Oct 24 14:36).