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 14:15:48 14:52:25 19:46:38 20:04:32 Oct 1 2 Oct 1, 2016 2 instances 20:48:25 22:03:32 4 3 Oct 4, 2016 3 instances 15:22:11 15:55:17 18:36:47 Nov Dec 30