8 instances from 2 years 2018 - 4 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2018 4 instances 04:30:23 04:30:42 04:33:36 04:36:59 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 04:17:40 04:22:47 Jul Aug Sep Oct 2 Nov Dec 25