17 instances from 4 years 2021 - 1 instance Jan Feb Mar 20 Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 7 Jun 21, 2018 7 instances 06:48:25 06:48:29 06:48:54 06:54:07 13:31:10 14:17:06 20:40:01 Jul Aug Sep Oct Nov Dec 2017 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 04:41:07 04:41:14 Nov 2 2 Nov 2, 2017 2 instances 20:14:36 20:14:39 8 2 Nov 8, 2017 2 instances 16:12:50 16:12:52 Dec 25 2 Dec 25, 2017 2 instances 06:01:57 12:08:26