8 instances from 4 years 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep 23 Oct Nov Dec 2018 - 4 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2018 4 instances 04:24:03 04:24:23 04:27:17 04:30:41 Jul Aug Sep Oct Nov Dec 2017 - 1 instance Jan 6 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2016 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 29