8 instances from 2 years 2018 - 4 instances Jan Feb Mar Apr May Jun 22 4 Jun 22, 2018 4 instances 16:29:52 18:28:12 19:04:53 19:16:05 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 22:18:37 23:50:14 Jul Aug Sep Oct 3 Nov Dec 26