15 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 07:29:51 07:29:54 07:29:55 07:38:01 07:38:04 15:55:39 24 Jul Aug Sep Oct Nov Dec 2017 - 6 instances Jan Feb Mar Apr May Jun 23 24 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 04:10:12 04:10:25 Nov Dec 25 2 Dec 25, 2017 2 instances 05:44:42 05:44:45