$ journalctl --list-boots
-42 7fe7c3... Fri 2020-12-04 05:13:59 - Wed 2020-12-16 16:01:23 
-41 332e99... Wed 2020-12-16 20:07:39 - Fri 2020-12-18 22:08:13 
[...]
-1 e0fe5f... Mon 2021-03-29 20:47:46 - Mon 2021-03-29 21:59:29
 0 37fbe4... Tue 2021-03-30 04:46:13 - Tue 2021-03-30 10:42:08