20 instances from 4 years 2021 - 1 instance Jan Feb Mar 20 Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 5 Jun 21, 2018 5 instances 03:16:29 03:16:32 03:16:32 03:18:10 19:24:01 22 2 Jun 22, 2018 2 instances 15:54:11 16:11:05 Jul Aug Sep Oct Nov Dec 2017 - 11 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 02:11:24 02:11:50 02:13:11 03:56:49 03:58:55 03:59:35 Jul Aug Sep Oct 2 Nov 8 2 Nov 8, 2017 2 instances 21:51:47 21:51:49 Dec 25 2 Dec 25, 2017 2 instances 03:49:22 03:49:26