20 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 8 instances Jan Feb Mar Apr May Jun 21 7 Jun 21, 2018 7 instances 07:01:47 07:01:48 07:07:09 18:56:09 19:07:06 19:11:25 20:45:30 22 Jul Aug Sep Oct Nov Dec 2017 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 25 2 Dec 25, 2017 2 instances 06:15:00 15:28:52 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 21:01:33 21:07:08 21:07:10 21:07:20 Oct 1 2 Oct 1, 2016 2 instances 09:20:04 09:27:03 4 3 Oct 4, 2016 3 instances 05:17:10 05:24:11 05:32:21 Nov Dec