19 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 3 instances Jan 18 Feb Mar Apr May Jun 29 Jul Aug Sep Oct Nov 13 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2018 - 4 instances Jan 4 Feb Mar Apr May Jun 21 22 26 Jul Aug Sep Oct Nov Dec 2017 - 3 instances Jan 6 Feb Mar Apr May Jun 21 Jul Aug Sep Oct 8 Nov Dec 2016 - 6 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 13:12:21 17:27:20 21:58:10 21 Jul Aug Sep 19 Oct 3 Nov Dec