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 03:16:53 03:16:55 03:16:56 03:18:34 19:24:09 22 2 Jun 22, 2018 2 instances 15:54:17 16:11:12 Jul Aug Sep Oct Nov Dec 2017 - 11 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 02:11:50 02:12:16 02:13:37 03:56:56 03:59:02 03:59:42 Jul Aug Sep Oct 2 Nov 8 2 Nov 8, 2017 2 instances 16:17:05 16:17:07 Dec 25 2 Dec 25, 2017 2 instances 03:49:52 03:49:55