19 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:28:08 03:28:43 03:29:37 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 20:19:48 20:22:39 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 11 instances Jan Feb Mar Apr May Jun 20 2 Jun 20, 2016 2 instances 09:46:53 10:07:56 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:13:39 17:17:18 17:19:56 Oct 1 2 Oct 1, 2016 2 instances 01:40:25 01:45:20 3 3 Oct 3, 2016 3 instances 17:20:34 17:25:23 17:25:56 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 18