20 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 12 Dec 2019 - 1 instance Jan Feb Mar Apr May Jun 22 Jul Aug Sep Oct Nov Dec 2018 - 2 instances Jan 1 Feb Mar Apr May Jun Jul 16 Aug Sep Oct Nov Dec 2017 - 4 instances Jan 1 11 Feb Mar Apr May Jun 26 Jul Aug Sep Oct 9 Nov Dec 2016 - 11 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 13:04:40 17:01:14 21:53:40 21 Jul Aug Sep 19 2 Sep 19, 2016 2 instances 15:31:13 16:14:28 Oct 1 2 Oct 1, 2016 2 instances 22:06:15 23:20:08 4 3 Oct 4, 2016 3 instances 16:45:00 17:13:38 19:51:40 Nov Dec