18 instances from 4 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 12 Dec 2017 - 3 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct 9 Nov Dec 2016 - 13 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 13:15:59 17:21:06 22:01:33 21 Jul Aug Sep 20 3 Sep 20, 2016 3 instances 15:25:10 16:15:49 21:14:16 Oct 1 2 4 3 Oct 4, 2016 3 instances 17:34:02 18:01:39 20:39:57 Nov Dec 30