20 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 6 Dec 2020 - 4 instances Jan 18 Feb Mar Apr May Jun 30 Jul Aug Sep Oct Nov 12 13 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2018 - 6 instances Jan 1 7 8 Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:04:46 10:53:15 19:16:27 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 7 Feb Mar Apr May Jun 21 Jul Aug Sep Oct 4 Nov Dec 25 2016 - 3 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct 6 2 Oct 6, 2016 2 instances 09:10:50 09:59:17 Nov Dec 30