Risshun (Start of spring): dates and times 1951–2050

How often each date occurs

Feb 38

Feb 482

Feb 510

Year	Date	Day	Time (JST)
1951	Feb 5	Mon	00:13
1952	Feb 5	Tue	05:53
1953	Feb 4	Wed	11:46
1954	Feb 4	Thu	17:30
1955	Feb 4	Fri	23:17
1956	Feb 5	Sun	05:12
1957	Feb 4	Mon	10:54
1958	Feb 4	Tue	16:49
1959	Feb 4	Wed	22:42
1960	Feb 5	Fri	04:23
1961	Feb 4	Sat	10:22
1962	Feb 4	Sun	16:17
1963	Feb 4	Mon	22:08
1964	Feb 5	Wed	04:05
1965	Feb 4	Thu	09:46
1966	Feb 4	Fri	15:38
1967	Feb 4	Sat	21:31
1968	Feb 5	Mon	03:07
1969	Feb 4	Tue	08:59
1970	Feb 4	Wed	14:46
1971	Feb 4	Thu	20:25
1972	Feb 5	Sat	02:20
1973	Feb 4	Sun	08:04
1974	Feb 4	Mon	14:00
1975	Feb 4	Tue	19:59
1976	Feb 5	Thu	01:39
1977	Feb 4	Fri	07:33
1978	Feb 4	Sat	13:27
1979	Feb 4	Sun	19:12
1980	Feb 5	Tue	01:09
1981	Feb 4	Wed	06:55
1982	Feb 4	Thu	12:45
1983	Feb 4	Fri	18:40
1984	Feb 5	Sun	00:19
1985	Feb 4	Mon	06:12
1986	Feb 4	Tue	12:08
1987	Feb 4	Wed	17:52
1988	Feb 4	Thu	23:43
1989	Feb 4	Sat	05:27
1990	Feb 4	Sun	11:14
1991	Feb 4	Mon	17:08
1992	Feb 4	Tue	22:48
1993	Feb 4	Thu	04:37
1994	Feb 4	Fri	10:31
1995	Feb 4	Sat	16:13
1996	Feb 4	Sun	22:08
1997	Feb 4	Tue	04:02
1998	Feb 4	Wed	09:57
1999	Feb 4	Thu	15:57
2000	Feb 4	Fri	21:40
2001	Feb 4	Sun	03:29
2002	Feb 4	Mon	09:24
2003	Feb 4	Tue	15:05
2004	Feb 4	Wed	20:56
2005	Feb 4	Fri	02:43
2006	Feb 4	Sat	08:27
2007	Feb 4	Sun	14:18
2008	Feb 4	Mon	20:00
2009	Feb 4	Wed	01:50
2010	Feb 4	Thu	07:48
2011	Feb 4	Fri	13:33
2012	Feb 4	Sat	19:22
2013	Feb 4	Mon	01:13
2014	Feb 4	Tue	07:03
2015	Feb 4	Wed	12:58
2016	Feb 4	Thu	18:46
2017	Feb 4	Sat	00:34
2018	Feb 4	Sun	06:28
2019	Feb 4	Mon	12:14
2020	Feb 4	Tue	18:03
2021	Feb 3	Wed	23:59
2022	Feb 4	Fri	05:51
2023	Feb 4	Sat	11:43
2024	Feb 4	Sun	17:27
2025	Feb 3	Mon	23:10
2026	Feb 4	Wed	05:02
2027	Feb 4	Thu	10:46
2028	Feb 4	Fri	16:31
2029	Feb 3	Sat	22:21
2030	Feb 4	Mon	04:08
2031	Feb 4	Tue	09:58
2032	Feb 4	Wed	15:49
2033	Feb 3	Thu	21:42
2034	Feb 4	Sat	03:41
2035	Feb 4	Sun	09:32
2036	Feb 4	Mon	15:20
2037	Feb 3	Tue	21:12
2038	Feb 4	Thu	03:04
2039	Feb 4	Fri	08:53
2040	Feb 4	Sat	14:40
2041	Feb 3	Sun	20:25
2042	Feb 4	Tue	02:13
2043	Feb 4	Wed	07:59
2044	Feb 4	Thu	13:44
2045	Feb 3	Fri	19:36
2046	Feb 4	Sun	01:31
2047	Feb 4	Mon	07:18
2048	Feb 4	Tue	13:05
2049	Feb 3	Wed	18:54
2050	Feb 4	Fri	00:44

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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Risshun (Start of spring) (solar longitude 315°): earliest in 2049 (Feb 3 18:54 JST), latest in 1952 (Feb 5 05:53).