18 instances from 4 years 2020 - 2 instances Jan 19 Feb Mar Apr May Jun Jul 1 Aug Sep Oct Nov Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2017 - 2 instances Jan 7 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 14:16:54 14:52:53 19:47:25 20:05:19 Oct 1 2 Oct 1, 2016 2 instances 20:49:10 22:04:01 4 3 Oct 4, 2016 3 instances 15:22:56 15:56:01 18:37:31 Nov Dec 30