12 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:50:55 03:51:47 03:52:57 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 21:06:27 21:06:27 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 4 instances Jan Feb Mar Apr May Jun 20 4 Jun 20, 2016 4 instances 08:41:00 08:57:17 10:40:56 13:13:35 Jul Aug Sep Oct Nov Dec 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 18