20 instances from 5 years 2020 - 1 instance Jan 22 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 3 instances Jan Feb Mar Apr May Jun 22 Jul Aug Sep 18 Oct 26 Nov Dec 2018 - 2 instances Jan 12 Feb Mar Apr May Jun Jul 12 Aug Sep Oct Nov Dec 2017 - 2 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 21 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:02:01 16:51:03 21:32:53 21:50:24 Oct 1 2 Oct 1, 2016 2 instances 22:43:14 23:56:00 4 3 Oct 4, 2016 3 instances 17:22:29 17:50:07 20:28:28 Nov Dec 30