Table 2. Start time, end time, and duration of solar cycles 21–25

Solar cycle	Start (minimum)	Maximum	Duration (yr)
21	1976 January	1979 October	11.0
22	1987 January	1989 July	9.2
23	1996 April	2000 July	12.9
24	2009 March	2014 January	10.5
25	2019 October	2024 July*

Indicates the preliminary definition of solar maximum.