8 instances from 2 years 2017 - 2 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 10:10:39 10:10:57 Jul Aug Sep Oct Nov Dec 2016 - 6 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 3 Sep 19, 2016 3 instances 16:23:13 16:27:57 16:28:01 Oct 1 3 Nov Dec 29