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 04:20:26 04:20:27 04:20:30 04:21:18 04:21:21 19:47:17 23 Jul Aug Sep Oct Nov Dec 2017 - 11 instances Jan Feb Mar Apr May Jun 21 5 Jun 21, 2017 5 instances 02:57:53 03:06:30 04:16:19 04:18:09 04:18:47 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 03:25:43 04:55:12 Nov 2 2 Nov 2, 2017 2 instances 23:10:14 23:10:17 8 2 Nov 8, 2017 2 instances 22:40:27 22:40:29 Dec