12 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 - 4 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2018 4 instances 06:53:11 06:53:18 06:58:37 20:41:43 Jul Aug Sep Oct Nov Dec 2017 - 6 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2017 3 instances 04:11:40 04:13:33 04:14:15 Jul Aug Sep Oct 2 Nov 8 Dec 25