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 6 Jun 21, 2018 6 instances 04:20:10 04:20:13 04:20:14 04:21:01 04:21:04 19:47:12 23 Jul Aug Sep Oct Nov Dec 2017 - 11 instances Jan Feb Mar Apr May Jun 21 5 Jun 21, 2017 5 instances 02:57:40 03:06:17 04:16:15 04:18:06 04:18:44 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 03:25:30 04:55:09 Nov 2 2 Nov 2, 2017 2 instances 22:45:47 22:45:49 8 2 Nov 8, 2017 2 instances 22:40:17 22:40:19 Dec