20 instances from 5 years 2021 - 1 instance Jan Feb Mar Apr May Jun 27 Jul Aug Sep Oct Nov Dec 2020 - 1 instance Jan Feb Mar Apr May Jun 28 Jul Aug Sep Oct Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:05:41 03:05:44 03:05:51 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 08:35:15 08:41:10 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 15:22:35 15:35:24 15:43:16 15:46:50 30 2 Sep 30, 2016 2 instances 21:50:37 21:53:11 Oct 3 3 Oct 3, 2016 3 instances 13:57:27 14:06:12 14:23:05 Nov Dec 29