16 instances from 4 years 2020 - 1 instance Jan Feb Mar Apr May Jun Jul 1 Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 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 14:16:50 14:52:50 19:47:22 20:05:16 Oct 1 2 Oct 1, 2016 2 instances 20:49:06 22:03:58 4 3 Oct 4, 2016 3 instances 15:22:52 15:55:58 18:37:27 Nov Dec 30