18 instances from 5 years 2020 - 2 instances Jan 18 Feb Mar Apr May Jun 29 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 22 26 Jul Aug Sep Oct Nov Dec 2017 - 2 instances Jan 6 Feb Mar Apr May Jun 21 Jul Aug Sep Oct Nov Dec 2016 - 9 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 13:27:40 17:19:07 22:11:39 21 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 16:01:08 16:44:18 18:17:02 30 Oct 3 Nov Dec