20 instances from 5 years 2020 - 1 instance Jan 18 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:39:33 12:57:49 17:41:27 Jul 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 15:45:10 16:35:41 21:16:40 21:34:13 Oct 1 2 Oct 1, 2016 2 instances 22:25:42 23:39:37 4 3 Oct 4, 2016 3 instances 17:04:58 17:33:18 20:11:16 Nov Dec 30