20 instances from 5 years 2020 - 2 instances Jan 18 Feb Mar Apr May Jun 28 Jul Aug Sep Oct Nov Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2018 - 5 instances Jan 8 15 Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:47:19 13:00:58 17:44:35 Jul Aug Sep Oct Nov Dec 2017 - 3 instances Jan 3 11 Feb Mar Apr May Jun 30 Jul Aug Sep Oct Nov Dec 2016 - 8 instances Jan Feb Mar Apr May Jun 21 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:09:37 16:58:06 21:40:36 21:58:11 Oct 3 2 Oct 3, 2016 2 instances 10:22:13 11:09:06 Nov Dec