19 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:28:18 03:28:53 03:29:47 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 20:19:57 20:22:48 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 11 instances Jan Feb Mar Apr May Jun 20 2 Jun 20, 2016 2 instances 09:38:25 10:08:18 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:13:48 17:17:27 17:20:06 Oct 1 2 Oct 1, 2016 2 instances 01:40:35 01:45:29 3 3 Oct 3, 2016 3 instances 17:20:43 17:25:33 17:26:05 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 18