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 07:01:37 07:01:37 07:06:58 18:56:05 19:07:02 19:11:21 20:45:24 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 06:14:47 15:28:48 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 21:01:12 21:06:47 21:06:48 21:06:59 Oct 1 2 Oct 1, 2016 2 instances 09:19:38 09:26:36 4 3 Oct 4, 2016 3 instances 05:16:37 05:23:37 05:31:48 Nov Dec