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 18:13:20 18:13:23 18:24:35 18:24:39 18:28:36 18:28:39 22 Jul Aug Sep Oct Nov Dec 2017 - 10 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 11:22:13 11:31:42 11:33:00 12:11:31 19:23:00 20:05:51 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 11:41:13 20:35:21 Nov Dec 25 2 Dec 25, 2017 2 instances 15:04:05 15:04:08