21 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 6 Jun 21, 2018 6 instances 04:17:04 04:17:06 04:17:07 04:17:34 04:17:37 19:46:06 23 Jul Aug Sep Oct Nov Dec 2017 - 12 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2017 4 instances 02:53:55 04:15:16 04:17:06 04:17:45 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 11:08:04 20:32:38 Nov 2 2 Nov 2, 2017 2 instances 23:09:57 23:09:59 8 2 Nov 8, 2017 2 instances 22:39:58 22:40:00 Dec 25 2 Dec 25, 2017 2 instances 14:15:05 14:15:09