17 instances from 4 years 2020 - 3 instances Jan 21 Feb Mar Apr May Jun Jul Aug Sep Oct Nov 13 15 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 27 Nov Dec 2018 - 5 instances Jan 7 8 Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 05:49:13 08:26:53 08:51:42 Jul Aug Sep Oct Nov Dec 2017 - 7 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 06:12:03 06:32:46 Jul Aug Sep Oct 2 4 Oct 2, 2017 4 instances 03:47:15 03:51:50 03:54:17 06:07:24 Nov Dec 25