19 instances from 4 years 2020 - 2 instances Jan 20 Feb Mar Apr May Jun Jul Aug Sep Oct Nov 20 Dec 2018 - 2 instances Jan Feb Mar Apr May Jun 22 27 Jul Aug Sep Oct Nov Dec 2017 - 3 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct 5 Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 21 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:28:16 17:16:33 21:59:03 22:16:39 Oct 1 2 4 3 Oct 4, 2016 3 instances 17:49:09 18:16:55 21:12:58 Nov Dec 30