19 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 6 Jun 21, 2018 6 instances 17:54:10 17:54:13 18:05:40 18:05:44 18:09:49 18:09:53 22 Jul Aug Sep Oct Nov Dec 2017 - 10 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 11:11:26 11:21:39 11:27:58 12:06:13 19:20:12 20:03:04 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 11:34:02 20:31:50 Nov Dec 25 2 Dec 25, 2017 2 instances 14:51:01 14:51:04